slovodefinícia
axis
(encz)
axis,osa n: Zdeněk Brož
Axis
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis
(gcide)
Axis \Ax"is\, n. [L.] (Zool.)
The spotted deer (Cervus axis or Axis maculata) of India,
where it is called hog deer and parrah (Moorish name).
[1913 Webster]
axis
(wn)
axis
n 1: a straight line through a body or figure that satisfies
certain conditions
2: the main stem or central part about which plant organs or
plant parts such as branches are arranged
3: in World War II the alliance of Germany and Italy in 1936
which later included Japan and other nations; "the Axis
opposed the Allies in World War II"
4: a group of countries in special alliance [syn: bloc,
axis]
5: the 2nd cervical vertebra; serves as a pivot for turning the
head [syn: axis, axis vertebra]
6: the center around which something rotates [syn: axis, {axis
of rotation}]
axis
(vera)
AXIS
Apache eXtensible Interaction System (Apache, SOAP)
podobné slovodefinícia
chemotaxis
(encz)
chemotaxis, n:
coordinate axis
(encz)
coordinate axis, n:
epistaxis
(encz)
epistaxis, n:
major axis
(encz)
major axis, n:
minor axis
(encz)
minor axis, n:
morphallaxis
(encz)
morphallaxis, n:
negative chemotaxis
(encz)
negative chemotaxis, n:
off-axis reflector
(encz)
off-axis reflector, n:
optic axis
(encz)
optic axis, n:
parapraxis
(encz)
parapraxis, n:
positive chemotaxis
(encz)
positive chemotaxis, n:
praxis
(encz)
praxis, n:
principal axis
(encz)
principal axis, n:
prophylaxis
(encz)
prophylaxis,prevence n: Zdeněk Brožprophylaxis,profylaxe n: Zdeněk Brož
saxist
(encz)
saxist, n:
semimajor axis
(encz)
semimajor axis, n:
semiminor axis
(encz)
semiminor axis, n:
taxis
(encz)
taxis,taxe Zdeněk Brožtaxis,taxíky n: pl. Zdeněk Brožtaxis,taxis n: Zdeněk Brož
taxistand
(encz)
taxistand, n:
x-axis
(encz)
x-axis,osa x n: [mat.] WiruZx-axis,úsečková souřadnice n: [mat.] mamm
y axis
(encz)
y axis,osa y n: [mat.] PetrV
y-axis
(encz)
y-axis,osa y n: [mat.] PetrV
z-axis
(encz)
z-axis,osa Z s tata
multi-axis thrust vectoring
(czen)
Multi-Axis Thrust Vectoring,MATV[zkr.] [voj.] Zdeněk Brož a automatický
překlad
taxis
(czen)
taxis,taxisn: Zdeněk Brož
Aerotaxis
(gcide)
Aerotaxis \A"["e]r*o*tax`is\, n. [NL. See A["e]ro-; Taxis.]
(Bacteriology)
The positive or negative stimulus exerted by oxygen on
a["e]robic and ana["e]robic bacteria. -- A`["e]r*o*tac"tic,
a.
[Webster 1913 Suppl.]
anaphylaxis
(gcide)
anaphylaxis \an`a*phy*lax"is\ n.
([a^]n`[.a]*f[imac]*l[a^]k"s[i^]s or
[a^]n`[.a]*f[i^]*l[a^]k"s[i^]s)
1. [Gr. 'ana` back, way from + fy`laxis security,
protection.]

1. (Med.) Hypersensitivity (to a foreign antigen) resulting
from prior contact with the same or a related substance.
[WordNet 1.5 + AS]

2. (Med.) An immediate but transient systemic reaction to an
antigenic substance to which a person has become
hypersensitized; it is characterized by the contraction of
smooth muscle and capillary dilation. --[Stedman]
[PJC + AS]

Note: The cascade of events is triggered by binding of the
foreign antigen to immunoglobulin E and release of
mediators such as histamine, bradykinin, serotonin, and
slow-reacting substance from mast cells. It involves
more than one organ system. The most commonly involved
organs are skin, cardiovascular, respiratory and
gastrointestinal systems. Anaphylaxis is manifested by
a range of signs and symptoms including pruritus,
urticaria, itching, dyspnea, abdominal pain and
cardiovascular collapse (shock). A severe form of the
reaction is called anaphylactic shock. --[Stedman]
[PJC + AS]

3. (Med) Anaphylactic shock.
[AS]anaphylactic shock \anaphylactic shock\ n.
([a^]n`[.a]*f[imac]*l[a^]k"t[i^]k sh[o^]k`) (Med.)
Shock resulting from anaphylaxis[2]. It is a severe form of
physiological shock, often having a fatal outcome, and is
caused by an extreme immunological reaction to antigens. It
is characterized by smooth muscle contraction and capillary
dilation throughout the body, initiated by antibodies of the
IgE class. It is usually seen when an antigen to which a
person has become hypersensitized is injected intravenously
or subcutaneously. It is also called {generalyzed
anaphylaxis} or systemic anaphylaxis, and sometimes
anaphylaxis. --[Stedman]
[PJC + AS]
Anticlinal axis
(gcide)
Anticlinal \An`ti*cli"nal\ ([a^]n`t[i^]*kl[imac]"nal), a. [Pref.
anti- + Gr. kli`nein to incline.]
1. Inclining or dipping in opposite directions. See
Synclinal.
[1913 Webster]

2. (Bot.) occurring at right angles to the surface of a plant
organ.
[PJC]

Anticlinal line, Anticlinal axis (Geol.), a line from
which strata dip in opposite directions, as from the ridge
of a roof.

Anticlinal vertebra (Anat.), one of the dorsal vertebr[ae],
which in many animals has an upright spine toward which
the spines of the neighboring vertebr[ae] are inclined.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]Axis \Ax"is\, n. [L.] (Zool.)
The spotted deer (Cervus axis or Axis maculata) of India,
where it is called hog deer and parrah (Moorish name).
[1913 Webster]
axis band
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis cylinder
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
axis in peritrochio
(gcide)
Wheel \Wheel\ (hw[=e]l), n. [OE. wheel, hweol, AS. hwe['o]l,
hweogul, hweowol; akin to D. wiel, Icel. hv[=e]l, Gr.
ky`klos, Skr. cakra; cf. Icel. hj[=o]l, Dan. hiul, Sw. hjul.
[root]218. Cf. Cycle, Cyclopedia.]
[1913 Webster]
1. A circular frame turning about an axis; a rotating disk,
whether solid, or a frame composed of an outer rim, spokes
or radii, and a central hub or nave, in which is inserted
the axle, -- used for supporting and conveying vehicles,
in machinery, and for various purposes; as, the wheel of a
wagon, of a locomotive, of a mill, of a watch, etc.
[1913 Webster]

The gasping charioteer beneath the wheel
Of his own car. --Dryden.
[1913 Webster]

2. Any instrument having the form of, or chiefly consisting
of, a wheel. Specifically:
[1913 Webster]
(a) A spinning wheel. See under Spinning.
[1913 Webster]
(b) An instrument of torture formerly used.
[1913 Webster]

His examination is like that which is made by
the rack and wheel. --Addison.
[1913 Webster]

Note: This mode of torture is said to have been first
employed in Germany, in the fourteenth century. The
criminal was laid on a cart wheel with his legs and
arms extended, and his limbs in that posture were
fractured with an iron bar. In France, where its use
was restricted to the most atrocious crimes, the
criminal was first laid on a frame of wood in the form
of a St. Andrew's cross, with grooves cut transversely
in it above and below the knees and elbows, and the
executioner struck eight blows with an iron bar, so as
to break the limbs in those places, sometimes finishing
by two or three blows on the chest or stomach, which
usually put an end to the life of the criminal, and
were hence called coups-de-grace -- blows of mercy. The
criminal was then unbound, and laid on a small wheel,
with his face upward, and his arms and legs doubled
under him, there to expire, if he had survived the
previous treatment. --Brande.
[1913 Webster]
(c) (Naut.) A circular frame having handles on the
periphery, and an axle which is so connected with the
tiller as to form a means of controlling the rudder
for the purpose of steering.
[1913 Webster]
(d) (Pottery) A potter's wheel. See under Potter.
[1913 Webster]

Then I went down to the potter's house, and,
behold, he wrought a work on the wheels. --Jer.
xviii. 3.
[1913 Webster]

Turn, turn, my wheel! This earthen jar
A touch can make, a touch can mar. --Longfellow.
[1913 Webster]
(e) (Pyrotechny) A firework which, while burning, is
caused to revolve on an axis by the reaction of the
escaping gases.
[1913 Webster]
(f) (Poetry) The burden or refrain of a song.
[1913 Webster]

Note: "This meaning has a low degree of authority, but is
supposed from the context in the few cases where the
word is found." --Nares.
[1913 Webster]

You must sing a-down a-down,
An you call him a-down-a.
O, how the wheel becomes it! --Shak.
[1913 Webster]
[1913 Webster]

3. A bicycle or a tricycle; a velocipede.
[1913 Webster]

4. A rolling or revolving body; anything of a circular form;
a disk; an orb. --Milton.
[1913 Webster]

5. A turn revolution; rotation; compass.
[1913 Webster]

According to the common vicissitude and wheel of
things, the proud and the insolent, after long
trampling upon others, come at length to be trampled
upon themselves. --South.
[1913 Webster]

[He] throws his steep flight in many an aery wheel.
--Milton.
[1913 Webster]

A wheel within a wheel, or Wheels within wheels, a
complication of circumstances, motives, etc.

Balance wheel. See in the Vocab.

Bevel wheel, Brake wheel, Cam wheel, Fifth wheel,
Overshot wheel, Spinning wheel, etc. See under Bevel,
Brake, etc.

Core wheel. (Mach.)
(a) A mortise gear.
(b) A wheel having a rim perforated to receive wooden
cogs; the skeleton of a mortise gear.

Measuring wheel, an odometer, or perambulator.

Wheel and axle (Mech.), one of the elementary machines or
mechanical powers, consisting of a wheel fixed to an axle,
and used for raising great weights, by applying the power
to the circumference of the wheel, and attaching the
weight, by a rope or chain, to that of the axle. Called
also axis in peritrochio, and perpetual lever, -- the
principle of equilibrium involved being the same as in the
lever, while its action is continuous. See {Mechanical
powers}, under Mechanical.

Wheel animal, or Wheel animalcule (Zool.), any one of
numerous species of rotifers having a ciliated disk at the
anterior end.

Wheel barometer. (Physics) See under Barometer.

Wheel boat, a boat with wheels, to be used either on water
or upon inclined planes or railways.

Wheel bug (Zool.), a large North American hemipterous
insect (Prionidus cristatus) which sucks the blood of
other insects. So named from the curious shape of the
prothorax.

Wheel carriage, a carriage moving on wheels.

Wheel chains, or Wheel ropes (Naut.), the chains or ropes
connecting the wheel and rudder.

Wheel cutter, a machine for shaping the cogs of gear
wheels; a gear cutter.

Wheel horse, one of the horses nearest to the wheels, as
opposed to a leader, or forward horse; -- called also
wheeler.

Wheel lathe, a lathe for turning railway-car wheels.

Wheel lock.
(a) A letter lock. See under Letter.
(b) A kind of gunlock in which sparks were struck from a
flint, or piece of iron pyrites, by a revolving wheel.
(c) A kind of brake a carriage.

Wheel ore (Min.), a variety of bournonite so named from the
shape of its twin crystals. See Bournonite.

Wheel pit (Steam Engine), a pit in the ground, in which the
lower part of the fly wheel runs.

Wheel plow, or Wheel plough, a plow having one or two
wheels attached, to render it more steady, and to regulate
the depth of the furrow.

Wheel press, a press by which railway-car wheels are forced
on, or off, their axles.

Wheel race, the place in which a water wheel is set.

Wheel rope (Naut.), a tiller rope. See under Tiller.

Wheel stitch (Needlework), a stitch resembling a spider's
web, worked into the material, and not over an open space.
--Caulfeild & S. (Dict. of Needlework).

Wheel tree (Bot.), a tree (Aspidosperma excelsum) of
Guiana, which has a trunk so curiously fluted that a
transverse section resembles the hub and spokes of a
coarsely made wheel. See Paddlewood.

Wheel urchin (Zool.), any sea urchin of the genus Rotula
having a round, flat shell.

Wheel window (Arch.), a circular window having radiating
mullions arranged like the spokes of a wheel. Cf. {Rose
window}, under Rose.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis in peritrochio
(gcide)
Wheel \Wheel\ (hw[=e]l), n. [OE. wheel, hweol, AS. hwe['o]l,
hweogul, hweowol; akin to D. wiel, Icel. hv[=e]l, Gr.
ky`klos, Skr. cakra; cf. Icel. hj[=o]l, Dan. hiul, Sw. hjul.
[root]218. Cf. Cycle, Cyclopedia.]
[1913 Webster]
1. A circular frame turning about an axis; a rotating disk,
whether solid, or a frame composed of an outer rim, spokes
or radii, and a central hub or nave, in which is inserted
the axle, -- used for supporting and conveying vehicles,
in machinery, and for various purposes; as, the wheel of a
wagon, of a locomotive, of a mill, of a watch, etc.
[1913 Webster]

The gasping charioteer beneath the wheel
Of his own car. --Dryden.
[1913 Webster]

2. Any instrument having the form of, or chiefly consisting
of, a wheel. Specifically:
[1913 Webster]
(a) A spinning wheel. See under Spinning.
[1913 Webster]
(b) An instrument of torture formerly used.
[1913 Webster]

His examination is like that which is made by
the rack and wheel. --Addison.
[1913 Webster]

Note: This mode of torture is said to have been first
employed in Germany, in the fourteenth century. The
criminal was laid on a cart wheel with his legs and
arms extended, and his limbs in that posture were
fractured with an iron bar. In France, where its use
was restricted to the most atrocious crimes, the
criminal was first laid on a frame of wood in the form
of a St. Andrew's cross, with grooves cut transversely
in it above and below the knees and elbows, and the
executioner struck eight blows with an iron bar, so as
to break the limbs in those places, sometimes finishing
by two or three blows on the chest or stomach, which
usually put an end to the life of the criminal, and
were hence called coups-de-grace -- blows of mercy. The
criminal was then unbound, and laid on a small wheel,
with his face upward, and his arms and legs doubled
under him, there to expire, if he had survived the
previous treatment. --Brande.
[1913 Webster]
(c) (Naut.) A circular frame having handles on the
periphery, and an axle which is so connected with the
tiller as to form a means of controlling the rudder
for the purpose of steering.
[1913 Webster]
(d) (Pottery) A potter's wheel. See under Potter.
[1913 Webster]

Then I went down to the potter's house, and,
behold, he wrought a work on the wheels. --Jer.
xviii. 3.
[1913 Webster]

Turn, turn, my wheel! This earthen jar
A touch can make, a touch can mar. --Longfellow.
[1913 Webster]
(e) (Pyrotechny) A firework which, while burning, is
caused to revolve on an axis by the reaction of the
escaping gases.
[1913 Webster]
(f) (Poetry) The burden or refrain of a song.
[1913 Webster]

Note: "This meaning has a low degree of authority, but is
supposed from the context in the few cases where the
word is found." --Nares.
[1913 Webster]

You must sing a-down a-down,
An you call him a-down-a.
O, how the wheel becomes it! --Shak.
[1913 Webster]
[1913 Webster]

3. A bicycle or a tricycle; a velocipede.
[1913 Webster]

4. A rolling or revolving body; anything of a circular form;
a disk; an orb. --Milton.
[1913 Webster]

5. A turn revolution; rotation; compass.
[1913 Webster]

According to the common vicissitude and wheel of
things, the proud and the insolent, after long
trampling upon others, come at length to be trampled
upon themselves. --South.
[1913 Webster]

[He] throws his steep flight in many an aery wheel.
--Milton.
[1913 Webster]

A wheel within a wheel, or Wheels within wheels, a
complication of circumstances, motives, etc.

Balance wheel. See in the Vocab.

Bevel wheel, Brake wheel, Cam wheel, Fifth wheel,
Overshot wheel, Spinning wheel, etc. See under Bevel,
Brake, etc.

Core wheel. (Mach.)
(a) A mortise gear.
(b) A wheel having a rim perforated to receive wooden
cogs; the skeleton of a mortise gear.

Measuring wheel, an odometer, or perambulator.

Wheel and axle (Mech.), one of the elementary machines or
mechanical powers, consisting of a wheel fixed to an axle,
and used for raising great weights, by applying the power
to the circumference of the wheel, and attaching the
weight, by a rope or chain, to that of the axle. Called
also axis in peritrochio, and perpetual lever, -- the
principle of equilibrium involved being the same as in the
lever, while its action is continuous. See {Mechanical
powers}, under Mechanical.

Wheel animal, or Wheel animalcule (Zool.), any one of
numerous species of rotifers having a ciliated disk at the
anterior end.

Wheel barometer. (Physics) See under Barometer.

Wheel boat, a boat with wheels, to be used either on water
or upon inclined planes or railways.

Wheel bug (Zool.), a large North American hemipterous
insect (Prionidus cristatus) which sucks the blood of
other insects. So named from the curious shape of the
prothorax.

Wheel carriage, a carriage moving on wheels.

Wheel chains, or Wheel ropes (Naut.), the chains or ropes
connecting the wheel and rudder.

Wheel cutter, a machine for shaping the cogs of gear
wheels; a gear cutter.

Wheel horse, one of the horses nearest to the wheels, as
opposed to a leader, or forward horse; -- called also
wheeler.

Wheel lathe, a lathe for turning railway-car wheels.

Wheel lock.
(a) A letter lock. See under Letter.
(b) A kind of gunlock in which sparks were struck from a
flint, or piece of iron pyrites, by a revolving wheel.
(c) A kind of brake a carriage.

Wheel ore (Min.), a variety of bournonite so named from the
shape of its twin crystals. See Bournonite.

Wheel pit (Steam Engine), a pit in the ground, in which the
lower part of the fly wheel runs.

Wheel plow, or Wheel plough, a plow having one or two
wheels attached, to render it more steady, and to regulate
the depth of the furrow.

Wheel press, a press by which railway-car wheels are forced
on, or off, their axles.

Wheel race, the place in which a water wheel is set.

Wheel rope (Naut.), a tiller rope. See under Tiller.

Wheel stitch (Needlework), a stitch resembling a spider's
web, worked into the material, and not over an open space.
--Caulfeild & S. (Dict. of Needlework).

Wheel tree (Bot.), a tree (Aspidosperma excelsum) of
Guiana, which has a trunk so curiously fluted that a
transverse section resembles the hub and spokes of a
coarsely made wheel. See Paddlewood.

Wheel urchin (Zool.), any sea urchin of the genus Rotula
having a round, flat shell.

Wheel window (Arch.), a circular window having radiating
mullions arranged like the spokes of a wheel. Cf. {Rose
window}, under Rose.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis maculata
(gcide)
Axis \Ax"is\, n. [L.] (Zool.)
The spotted deer (Cervus axis or Axis maculata) of India,
where it is called hog deer and parrah (Moorish name).
[1913 Webster]
Axis of a balance
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of a curve
(gcide)
Curve \Curve\, n. [See Curve, a., Cirb.]
1. A bending without angles; that which is bent; a flexure;
as, a curve in a railway or canal.
[1913 Webster]

2. (Geom.) A line described according to some low, and having
no finite portion of it a straight line.
[1913 Webster]

Axis of a curve. See under Axis.

Curve of quickest descent. See Brachystochrone.

Curve tracing (Math.), the process of determining the
shape, location, singular points, and other peculiarities
of a curve from its equation.

Plane curve (Geom.), a curve such that when a plane passes
through three points of the curve, it passes through all
the other points of the curve. Any other curve is called a
curve of double curvature, or a twisted curve.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of a lens
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of a microscope
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of a pyramid
(gcide)
Pyramid \Pyr"a*mid\, n. [L. pyramis, -idis, fr. Gr. ?, ?, of
Egyptian origin: cf. F. pyramide.]
[1913 Webster]
1. A solid body standing on a triangular, square, or
polygonal base, and terminating in a point at the top;
especially, a structure or edifice of this shape.
[1913 Webster]

2. (Geom.) A solid figure contained by a plane rectilineal
figure as base and several triangles which have a common
vertex and whose bases are sides of the base.
[1913 Webster]

3. pl. (Billiards) The game of pool in which the balls are
placed in the form of a triangle at spot. [Eng.]
[1913 Webster]

4. (Finance) a fraudulent investment scheme in which the
manager promises high profits, but instead of investing
the money in a genuine profit-making activity, uses the
money from later investors to pay the profits to earlier
investors; -- also called pyramid scheme or {pyramid
operation}. This process inevitably collapses when
insufficient new investors are available, leaving the
later investors with total or near-total losses of their
investments. The managers usually blame government
regulations or interference for the collapse of the
scheme, rather than admit fraud.
[PJC]

Altitude of a pyramid (Geom.), the perpendicular distance
from the vertex to the plane of the base.

Axis of a pyramid (Geom.), a straight line drawn from the
vertex to the center of the base.

Earth pyramid. (Geol.) See Earth pillars, under Earth.


Right pyramid (Geom.) a pyramid whose axis is perpendicular
to the base.
[1913 Webster]
Axis of a telescope
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of abscissas
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of ordinates
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of oscillation
(gcide)
Oscillation \Os`cil*la"tion\, n. [L. oscillatio a swinging.]
[1913 Webster]
1. The act of oscillating; a swinging or moving backward and
forward, like a pendulum; vibration.
[1913 Webster]

2. Fluctuation; variation; change back and forth.
[1913 Webster]

His mind oscillated, undoubtedly; but the extreme
points of the oscillation were not very remote.
--Macaulay.
[1913 Webster]

Axis of oscillation, Center of oscillation. See under
Axis, and Center.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of polarization
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of revolution
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of symmetry
(gcide)
Symmetry \Sym"me*try\, n. [L. symmetria, Gr. ?; sy`n with,
together + ? a measure: cf. F. sym['e]trie. See Syn-, and
Meter rhythm.]
1. A due proportion of the several parts of a body to each
other; adaptation of the form or dimensions of the several
parts of a thing to each other; the union and conformity
of the members of a work to the whole.
[1913 Webster]

2. (Biol.) The law of likeness; similarity of structure;
regularity in form and arrangement; orderly and similar
distribution of parts, such that an animal may be divided
into parts which are structurally symmetrical.
[1913 Webster]

Note: Bilateral symmetry, or two-sidedness, in vertebrates,
etc., is that in which the body can be divided into
symmetrical halves by a vertical plane passing through
the middle; radial symmetry, as in echinoderms, is that
in which the individual parts are arranged
symmetrically around a central axis; serial symmetry,
or zonal symmetry, as in earthworms, is that in which
the segments or metameres of the body are disposed in a
zonal manner one after the other in a longitudinal
axis. This last is sometimes called metamerism.
[1913 Webster]

3. (Bot.)
(a) Equality in the number of parts of the successive
circles in a flower.
(b) Likeness in the form and size of floral organs of the
same kind; regularity.
[1913 Webster]

Axis of symmetry. (Geom.) See under Axis.

Respective symmetry, that disposition of parts in which
only the opposite sides are equal to each other.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of the
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Axis of the Ionic capital
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Brachydiagonal axis
(gcide)
Brachydiagonal \Brach`y*di*ag"o*nal\, a. [Gr. brachy`s short +
E. diagonal.]
Pertaining to the shorter diagonal, as of a rhombic prism.
[1913 Webster]

Brachydiagonal axis, the shorter lateral axis of an
orthorhombic crystal.
[1913 Webster]
Cervus axis
(gcide)
Axis \Ax"is\, n. [L.] (Zool.)
The spotted deer (Cervus axis or Axis maculata) of India,
where it is called hog deer and parrah (Moorish name).
[1913 Webster]
Chemiotaxis
(gcide)
Chemotaxis \Chem`o*tax"is\, n. Formerly also Chemiotaxis
\Chem`i*o*tax"is\ [Chemical + Gr. ? arrangement, fr. ? to
arrange.] (Biol.)
The sensitiveness exhibited by small free-swimming organisms,
as bacteria, zoospores of alg[ae], etc., to chemical
substances held in solution. They may be attracted ({positive
chemotaxis}) or repelled (negative chemotaxis). --
Chem`o*tac"tic, a. -- Chem`o*tac"tic*al*ly, adv.
[Webster 1913 Suppl.] chemotherapeutic
Chemotaxis
(gcide)
Chemotaxis \Chem`o*tax"is\, n. Formerly also Chemiotaxis
\Chem`i*o*tax"is\ [Chemical + Gr. ? arrangement, fr. ? to
arrange.] (Biol.)
The sensitiveness exhibited by small free-swimming organisms,
as bacteria, zoospores of alg[ae], etc., to chemical
substances held in solution. They may be attracted ({positive
chemotaxis}) or repelled (negative chemotaxis). --
Chem`o*tac"tic, a. -- Chem`o*tac"tic*al*ly, adv.
[Webster 1913 Suppl.] chemotherapeutic
coeliac axis
(gcide)
Coeliac \C[oe]"li*ac\, Celiac \Ce"li*ac\, a. [L. coeliacus, Gr.
?, fr. ? belly, fr. koi^los hollow.]
Relating to the abdomen, or to the cavity of the abdomen.
[1913 Webster]

C[oe]liac artery (Anat.), the artery which issues from the
aorta just below the diaphragm; -- called also {c[oe]liac
axis}.

C[oe]liac flux, C[oe]liac passion (Med.), a chronic flux
or diarrhea of undigested food.
[1913 Webster]
conjugate axis
(gcide)
Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
Conjugate axis of a hyperbola
(gcide)
Conjugate \Con"ju*gate\, a. [L. conjugatus, p. p. or conjugare
to unite; con- + jugare to join, yoke, marry, jugum yoke;
akin to jungere to join. See Join.]
1. United in pairs; yoked together; coupled.
[1913 Webster]

2. (Bot.) In single pairs; coupled.
[1913 Webster]

3. (Chem.) Containing two or more compounds or radicals
supposed to act the part of a single one. [R.]
[1913 Webster]

4. (Gram.) Agreeing in derivation and radical signification;
-- said of words.
[1913 Webster]

5. (Math.) Presenting themselves simultaneously and having
reciprocal properties; -- frequently used in pure and
applied mathematics with reference to two quantities,
points, lines, axes, curves, etc.
[1913 Webster]

Conjugate axis of a hyperbola (Math.), the line through the
center of the curve, perpendicular to the line through the
two foci.

Conjugate diameters (Conic Sections), two diameters of an
ellipse or hyperbola such that each bisects all chords
drawn parallel to the other.

Conjugate focus (Opt.) See under Focus.

Conjugate mirrors (Optics), two mirrors so placed that rays
from the focus of one are received at the focus of the
other, especially two concave mirrors so placed that rays
proceeding from the principal focus of one and reflected
in a parallel beam are received upon the other and brought
to the principal focus.

Conjugate point (Geom.), an acnode. See Acnode, and
Double point.

Self-conjugate triangle (Conic Sections), a triangle each
of whose vertices is the pole of the opposite side with
reference to a conic.
[1913 Webster]
Cylinder axis
(gcide)
Cylinder \Cyl"in*der\ (s?l"?n-d?r), n. [F. cylindre, OF.
cilindre, L. cylindrus, fr. Gr. ky`lindros, fr. kyli`ndein,
kyli`ein, to roll. Cf. Calender the machine.]
[1913 Webster]
1. (Geom.)
(a) A solid body which may be generated by the rotation of
a parallelogram round one its sides; or a body of
rollerlike form, of which the longitudinal section is
oblong, and the cross section is circular.
(b) The space inclosed by any cylindrical surface. The
space may be limited or unlimited in length.
[1913 Webster]

2. Any hollow body of cylindrical form, as:
(a) The chamber of a steam engine in which the piston is
moved by the force of steam.
(b) The barrel of an air or other pump.
(c) (Print.) The revolving platen or bed which produces
the impression or carries the type in a cylinder
press.
(d) The bore of a gun; the turning chambered breech of a
revolver.
[1913 Webster]

3. The revolving square prism carrying the cards in a
Jacquard loom.
[1913 Webster]

Cylinder axis. (Anat.) See Axis cylinder, under Axis.


Cylinder engine (Paper Making), a machine in which a
cylinder takes up the pulp and delivers it in a continuous
sheet to the dryers.

Cylinder escapement. See Escapement.

Cylinder glass. See Glass.

Cylinder mill. See Roller mill.

Cylinder press. See Press.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
cylinder axis
(gcide)
Cylinder \Cyl"in*der\ (s?l"?n-d?r), n. [F. cylindre, OF.
cilindre, L. cylindrus, fr. Gr. ky`lindros, fr. kyli`ndein,
kyli`ein, to roll. Cf. Calender the machine.]
[1913 Webster]
1. (Geom.)
(a) A solid body which may be generated by the rotation of
a parallelogram round one its sides; or a body of
rollerlike form, of which the longitudinal section is
oblong, and the cross section is circular.
(b) The space inclosed by any cylindrical surface. The
space may be limited or unlimited in length.
[1913 Webster]

2. Any hollow body of cylindrical form, as:
(a) The chamber of a steam engine in which the piston is
moved by the force of steam.
(b) The barrel of an air or other pump.
(c) (Print.) The revolving platen or bed which produces
the impression or carries the type in a cylinder
press.
(d) The bore of a gun; the turning chambered breech of a
revolver.
[1913 Webster]

3. The revolving square prism carrying the cards in a
Jacquard loom.
[1913 Webster]

Cylinder axis. (Anat.) See Axis cylinder, under Axis.


Cylinder engine (Paper Making), a machine in which a
cylinder takes up the pulp and delivers it in a continuous
sheet to the dryers.

Cylinder escapement. See Escapement.

Cylinder glass. See Glass.

Cylinder mill. See Roller mill.

Cylinder press. See Press.
[1913 Webster]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]
cytotaxis
(gcide)
cytotaxis \cy`to*tax"is\ (s[imac]`t[-o]*t[a^]k"s[i^]s), n.
(Biology)
The movement of cells toward or away from other cells, as a
result of some stimulation, such as chemical signals
transmitted and received by the cells.
[PJC]
Epistaxis
(gcide)
Epistaxis \Ep`i*stax"is\, n. [NL., fr. Gr. 'epi` upon + ? to
drop.] (Med.)
Bleeding at the nose.
[1913 Webster] epistemic
generalyzed anaphylaxis
(gcide)
anaphylactic shock \anaphylactic shock\ n.
([a^]n`[.a]*f[imac]*l[a^]k"t[i^]k sh[o^]k`) (Med.)
Shock resulting from anaphylaxis[2]. It is a severe form of
physiological shock, often having a fatal outcome, and is
caused by an extreme immunological reaction to antigens. It
is characterized by smooth muscle contraction and capillary
dilation throughout the body, initiated by antibodies of the
IgE class. It is usually seen when an antigen to which a
person has become hypersensitized is injected intravenously
or subcutaneously. It is also called {generalyzed
anaphylaxis} or systemic anaphylaxis, and sometimes
anaphylaxis. --[Stedman]
[PJC + AS]
Homotaxis
(gcide)
Homotaxis \Ho`mo*tax"is\, n. [NL., fr. Gr. ? the same + ?
arrangement.] (Biol.)
Similarly in arrangement of parts; -- the opposite of
heterotaxy.
[1913 Webster]
Instantaneous axis of rotation
(gcide)
Instantaneous \In`stan*ta"ne*ous\, a. [Cf. F. instantan['e].]
[1913 Webster]
1. Done or occurring in an instant, or without any
perceptible duration of time; as, the passage of
electricity appears to be instantaneous.
[1913 Webster]

His reason saw
With instantaneous view, the truth of things.
--Thomson.
[1913 Webster]

2. At or during a given instant; as, instantaneous
acceleration, velocity, etc.
[1913 Webster]

Instantaneous center of rotation (Kinematics), in a plane
or in a plane figure which has motions both of translation
and of rotation in the plane, is the point which for the
instant is at rest.

Instantaneous axis of rotation (Kinematics), in a body
which has motions both of translation and rotation, is a
line, which is supposed to be rigidly united with the
body, and which for the instant is at rest. The motion of
the body is for the instant simply that of rotation about
the instantaneous axis. -- In`stan*ta"ne*ous*ly, adv. --
In`stan*ta"ne*ous*ness, n.
[1913 Webster]
Interaxis
(gcide)
Interaxis \In`ter*ax"is\, n.; pl. Interaxes. (Arch.)
The space between two axes. See Axis, 6.
[1913 Webster]

The doors, windows, niches, and the like, are then
placed centrally in the interaxes. --Gwilt.
[1913 Webster]
involute closely coiled so that the axis is obscured
(gcide)
coiled \coiled\ (koild), adj.
curled or wound especially in concentric rings or spirals;
as, a coiled snake ready to strike; the rope lay coiled on
the deck. Opposite of uncoiled.

Note: [Narrower terms: {coiling, helical, spiral, spiraling,
volute, voluted, whorled}; {convolute rolled
longitudinally upon itself};curled, curled up;
{involute closely coiled so that the axis is
obscured)}; looped, whorled; twined, twisted;
convoluted; {involute, rolled esp of petals or leaves
in bud: having margins rolled inward)}; wound]
[WordNet 1.5]
Lutianus caxis
(gcide)
Yelting \Yel"ting\, n. [Orig. uncert.]
The Florida and West Indian red snapper (Lutianus aya);
also, sometimes, one of certain other allied species, as
Lutianus caxis.
[Webster 1913 Suppl.]
major axis
(gcide)
major axis \major axis\ n. (Geom.),
The greater axis of a geometrical figure. Especially: the
longest axis of an ellipse or ellipsoid, which passes through
the two foci. See Focus, n., 2.
[WordNet 1.5 +PJC]Axis \Ax"is\, n.; pl. Axes. [L. axis axis, axle. See Axle.]
A straight line, real or imaginary, passing through a body,
on which it revolves, or may be supposed to revolve; a line
passing through a body or system around which the parts are
symmetrically arranged.
[1913 Webster]

2. (Math.) A straight line with respect to which the
different parts of a magnitude are symmetrically arranged;
as, the axis of a cylinder, i. e., the axis of a cone,
that is, the straight line joining the vertex and the
center of the base; the axis of a circle, any straight
line passing through the center.
[1913 Webster]

3. (Bot.) The stem; the central part, or longitudinal
support, on which organs or parts are arranged; the
central line of any body. --Gray.
[1913 Webster]

4. (Anat.)
(a) The second vertebra of the neck, or {vertebra
dentata}.
(b) Also used of the body only of the vertebra, which is
prolonged anteriorly within the foramen of the first
vertebra or atlas, so as to form the odontoid process
or peg which serves as a pivot for the atlas and head
to turn upon.
[1913 Webster]

5. (Crystallog.) One of several imaginary lines, assumed in
describing the position of the planes by which a crystal
is bounded.
[1913 Webster]

6. (Fine Arts) The primary or secondary central line of any
design.
[1913 Webster]

Anticlinal axis (Geol.), a line or ridge from which the
strata slope downward on the two opposite sides.

Synclinal axis, a line from which the strata slope upward
in opposite directions, so as to form a valley.

Axis cylinder (Anat.), the neuraxis or essential, central
substance of a nerve fiber; -- called also axis band,
axial fiber, and cylinder axis.

Axis in peritrochio, the wheel and axle, one of the
mechanical powers.

Axis of a curve (Geom.), a straight line which bisects a
system of parallel chords of a curve; called a {principal
axis}, when cutting them at right angles, in which case it
divides the curve into two symmetrical portions, as in the
parabola, which has one such axis, the ellipse, which has
two, or the circle, which has an infinite number. The two
axes of the ellipse are the major axis and the {minor
axis}, and the two axes of the hyperbola are the
transverse axis and the conjugate axis.

Axis of a lens, the straight line passing through its
center and perpendicular to its surfaces.

Axis of a microscope or Axis of a telescope, the straight
line with which coincide the axes of the several lenses
which compose it.

Axes of co["o]rdinates in a plane, two straight lines
intersecting each other, to which points are referred for
the purpose of determining their relative position: they
are either rectangular or oblique.

Axes of co["o]rdinates in space, the three straight lines
in which the co["o]rdinate planes intersect each other.

Axis of a balance, that line about which it turns.

Axis of oscillation, of a pendulum, a right line passing
through the center about which it vibrates, and
perpendicular to the plane of vibration.

Axis of polarization, the central line around which the
prismatic rings or curves are arranged. --Brewster.

Axis of revolution (Descriptive Geom.), a straight line
about which some line or plane is revolved, so that the
several points of the line or plane shall describe circles
with their centers in the fixed line, and their planes
perpendicular to it, the line describing a surface of
revolution, and the plane a solid of revolution.

Axis of symmetry (Geom.), any line in a plane figure which
divides the figure into two such parts that one part, when
folded over along the axis, shall coincide with the other
part.

Axis of the equator, ecliptic, horizon (or other circle
considered with reference to the sphere on which it lies),
the diameter of the sphere which is perpendicular to the
plane of the circle. --Hutton.

Axis of the Ionic capital (Arch.), a line passing
perpendicularly through the middle of the eye of the
volute.

Neutral axis (Mech.), the line of demarcation between the
horizontal elastic forces of tension and compression,
exerted by the fibers in any cross section of a girder.

Optic axis of a crystal, the direction in which a ray of
transmitted light suffers no double refraction. All
crystals, not of the isometric system, are either uniaxial
or biaxial.

Optic axis, Visual axis (Opt.), the straight line passing
through the center of the pupil, and perpendicular to the
surface of the eye.

Radical axis of two circles (Geom.), the straight line
perpendicular to the line joining their centers and such
that the tangents from any point of it to the two circles
shall be equal to each other.

Spiral axis (Arch.), the axis of a twisted column drawn
spirally in order to trace the circumvolutions without.

Axis of abscissas and Axis of ordinates. See Abscissa.
[1913 Webster]

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