slovodefinícia
spiral
(mass)
spiral
- špirála
spiral
(encz)
spiral,spirála Pavel Machek; Giza
spiral
(encz)
spiral,točitý adj: Rostislav Svoboda
Spiral
(gcide)
Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
1. (Geom.) A plane curve, not reentrant, described by a
point, called the generatrix, moving along a straight line
according to a mathematical law, while the line is
revolving about a fixed point called the pole. Cf.
Helix.
[1913 Webster]

2. Anything which has a spiral form, as a spiral shell.
[1913 Webster]

Equiangular spiral,a plane curve which cuts all its
generatrices at the same angle. Same as {Logarithmic
spiral}, under Logarithmic.

Spiral of Archimedes, a spiral the law of which is that the
generatrix moves uniformly along the revolving line, which
also moves uniformly.
[1913 Webster]
Spiral
(gcide)
Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
spiral
(wn)
spiral
adj 1: in the shape of a coil [syn: coiling, helical,
spiral, spiraling, volute, voluted, whorled,
turbinate]
n 1: a plane curve traced by a point circling about the center
but at increasing distances from the center
2: a curve that lies on the surface of a cylinder or cone and
cuts the element at a constant angle [syn: helix, spiral]
3: a continuously accelerating change in the economy
4: ornament consisting of a curve on a plane that winds around a
center with an increasing distance from the center [syn:
spiral, volute]
5: a structure consisting of something wound in a continuous
series of loops; "a coil of rope" [syn: coil, spiral,
volute, whorl, helix]
6: flying downward in a helical path with a large radius
v 1: to wind or move in a spiral course; "the muscles and nerves
of his fine drawn body were coiling for action"; "black
smoke coiling up into the sky"; "the young people gyrated
on the dance floor" [syn: gyrate, spiral, coil]
2: form a spiral; "The path spirals up the mountain"
3: move in a spiral or zigzag course [syn: corkscrew,
spiral]
podobné slovodefinícia
spirala
(msasasci)
spirala
- spiral
inflation spiral
(encz)
inflation spiral,inflační spirála Mgr. Dita Gálová
inflationary spiral
(encz)
inflationary spiral, n:
musculospiral nerve
(encz)
musculospiral nerve, n:
spiral bandage
(encz)
spiral bandage, n:
spiral galaxy
(encz)
spiral galaxy, n:
spiral nebula
(encz)
spiral nebula, n:
spiral ratchet screwdriver
(encz)
spiral ratchet screwdriver, n:
spiral spring
(encz)
spiral spring, n:
spiral valve
(encz)
spiral valve,spirální řasa n: [bio.] tyflosolis Jirka Daněk
spiraling
(encz)
spiraling, adj:
spiralled
(encz)
spiralled,
spiralling
(encz)
spiralling,spirálový adj: Zdeněk Brožspiralling,točivý adj: Zdeněk Brož
spirally
(encz)
spirally,se spirálami Zdeněk Brož
wage-price spiral
(encz)
wage-price spiral,
coiling helical spiral spiraling volute voluted whorled
(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]
Concho-spiral
(gcide)
Concho-spiral \Con`cho-spi"ral\, n.
A kind of spiral curve found in certain univalve shells.
--Agassiz.
[1913 Webster] Conchylaceous
Equiangular spiral
(gcide)
Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
1. (Geom.) A plane curve, not reentrant, described by a
point, called the generatrix, moving along a straight line
according to a mathematical law, while the line is
revolving about a fixed point called the pole. Cf.
Helix.
[1913 Webster]

2. Anything which has a spiral form, as a spiral shell.
[1913 Webster]

Equiangular spiral,a plane curve which cuts all its
generatrices at the same angle. Same as {Logarithmic
spiral}, under Logarithmic.

Spiral of Archimedes, a spiral the law of which is that the
generatrix moves uniformly along the revolving line, which
also moves uniformly.
[1913 Webster]Equiangular \E`qui*an"gu*lar\, a. [Equi- + angular. Cf.
Equangular.]
Having equal angles; as, an equiangular figure; a square is
equiangular.
[1913 Webster]

Equiangular spiral. (Math.) See under Spiral, n.

Mutually equiangular, applied to two figures, when every
angle of the one has its equal among the angles of the
other.
[1913 Webster]
Hyperbolic spiral
(gcide)
Hyperbolic \Hy`per*bol"ic\, Hyperbolical \Hy`per*bol"ic*al\, a.
[L. hyperbolicus, Gr. ?: cf. F. hyperbolique.]
1. (Math.) Belonging to the hyperbola; having the nature of
the hyperbola.
[1913 Webster]

2. (Rhet.) Relating to, containing, or of the nature of,
hyperbole; exaggerating or diminishing beyond the fact;
exceeding the truth; as, an hyperbolical expression. "This
hyperbolical epitaph." --Fuller.
[1913 Webster]

Hyperbolic functions (Math.), certain functions which have
relations to the hyperbola corresponding to those which
sines, cosines, tangents, etc., have to the circle; and
hence, called hyperbolic sines, hyperbolic cosines,
etc.

Hyperbolic logarithm. See Logarithm.

Hyperbolic spiral (Math.), a spiral curve, the law of which
is, that the distance from the pole to the generating
point varies inversely as the angle swept over by the
radius vector.
[1913 Webster]
Logarithmic spiral
(gcide)
Logarithmic \Log`a*rith"mic\, Logarithmical \Log`a*rith"mic*al\,
a. [Cf. F. logarithmique.]
1. Of or pertaining to logarithms; consisting of logarithms.
[1913 Webster]

2. Using logarithms; as, logarithmic graph paper; a
logarithmic scale.
[PJC]

3. Having a logarithm in one or more of the unknowns; -- of
an equation.
[PJC]

Logarithmic curve (Math.), a curve which, referred to a
system of rectangular coordinate axes, is such that the
ordinate of any point will be the logarithm of its
abscissa.

Logarithmic spiral, a spiral curve such that radii drawn
from its pole or eye at equal angles with each other are
in continual proportion. See Spiral.
[1913 Webster]Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
1. (Geom.) A plane curve, not reentrant, described by a
point, called the generatrix, moving along a straight line
according to a mathematical law, while the line is
revolving about a fixed point called the pole. Cf.
Helix.
[1913 Webster]

2. Anything which has a spiral form, as a spiral shell.
[1913 Webster]

Equiangular spiral,a plane curve which cuts all its
generatrices at the same angle. Same as {Logarithmic
spiral}, under Logarithmic.

Spiral of Archimedes, a spiral the law of which is that the
generatrix moves uniformly along the revolving line, which
also moves uniformly.
[1913 Webster]
Multispiral
(gcide)
Multispiral \Mul`ti*spi"ral\, a. [Multi- + spiral.] (Zool.)
Having numerous spiral coils round a center or nucleus; --
said of the opercula of certain shells.
[1913 Webster]
Musculospiral
(gcide)
Musculospiral \Mus`cu*lo*spi"ral\, a. [L. musculus muscle + E.
spiral.] (Anat.)
Of or pertaining to the muscles, and taking a spiral course;
-- applied esp. to a large nerve of the arm.
[1913 Webster]
Parabolic spiral
(gcide)
Parabolic \Par`a*bol"ic\, Parabolical \Par`a*bol"ic*al\, a. [Gr.
paraboliko`s figurative: cf. F. parabolique. See Parable.]
[1913 Webster]
1. Of the nature of a parable; expressed by a parable or
figure; allegorical; as, parabolical instruction.
[1913 Webster]

2. [From Parabola.] (Geom.)
(a) Having the form or nature of a parabola; pertaining
to, or resembling, a parabola; as, a parabolic curve.
(b) Having a form like that generated by the revolution of
a parabola, or by a line that moves on a parabola as a
directing curve; as, a parabolic conoid; a parabolic
reflector; a parabolic antenna.
[1913 Webster +PJC]

Parabolic conoid, a paraboloid; a conoid whose directing
curve is a parabola. See Conoid.

Parabolic mirror (Opt.), a mirror having a paraboloidal
surface which gives for parallel rays (as those from very
distant objects) images free from aberration. It is used
in reflecting telescopes.

Parabolic spindle, the solid generated by revolving the
portion of a parabola cut off by a line drawn at right
angles to the axis of the curve, about that line as an
axis.

Parabolic spiral, a spiral curve conceived to be formed by
the periphery of a semiparabola when its axis is wrapped
about a circle; also, any other spiral curve having an
analogy to the parabola.
[1913 Webster]
Paucispiral
(gcide)
Paucispiral \Pau`ci*spi"ral\, a. [L. paucus few + E. spiral.]
(Zool.)
Having few spirals, or whorls; as, a paucispiral operculum or
shell.
[1913 Webster]
Spiral
(gcide)
Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
1. (Geom.) A plane curve, not reentrant, described by a
point, called the generatrix, moving along a straight line
according to a mathematical law, while the line is
revolving about a fixed point called the pole. Cf.
Helix.
[1913 Webster]

2. Anything which has a spiral form, as a spiral shell.
[1913 Webster]

Equiangular spiral,a plane curve which cuts all its
generatrices at the same angle. Same as {Logarithmic
spiral}, under Logarithmic.

Spiral of Archimedes, a spiral the law of which is that the
generatrix moves uniformly along the revolving line, which
also moves uniformly.
[1913 Webster]Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
Spiral 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]
Spiral gear
(gcide)
Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
Spiral gearing
(gcide)
Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
spiral nebula
(gcide)
Nebula \Neb"u*la\ (n[e^]b"[-u]*l[.a]), n.; pl. Nebulae
(n[e^]b"[-u]*l[=e]). [L., mist, cloud; akin to Gr. nefe`lh,
ne`fos, cloud, mist, G. nebel mist, OHG. nebul, D. nevel,
Skr. nabhas cloud, mist. Cf. Nebule.]
1. (Astron.) A faint, cloudlike, self-luminous mass of matter
situated beyond the solar system among the stars. The term
was originally applied to any diffuse luminous region.
Now, technically, it is applied to interstellar clouds of
dust and gases (diffuse nebula). However distant
galaxies and very distant star clusters often appear like
them in the telescope, such as the spiral nebula in
Andromeda, known now to be a distant galaxy.
[1913 Webster +PJC]

2. (Med.)
(a) A white spot or a slight opacity of the cornea.
(b) A cloudy appearance in the urine. [Obs.]
[1913 Webster]
Spiral of Archimedes
(gcide)
Spiral \Spi"ral\, n. [Cf. F. spirale. See Spiral, a.]
1. (Geom.) A plane curve, not reentrant, described by a
point, called the generatrix, moving along a straight line
according to a mathematical law, while the line is
revolving about a fixed point called the pole. Cf.
Helix.
[1913 Webster]

2. Anything which has a spiral form, as a spiral shell.
[1913 Webster]

Equiangular spiral,a plane curve which cuts all its
generatrices at the same angle. Same as {Logarithmic
spiral}, under Logarithmic.

Spiral of Archimedes, a spiral the law of which is that the
generatrix moves uniformly along the revolving line, which
also moves uniformly.
[1913 Webster]
Spiral operculum
(gcide)
Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
Spiral shell
(gcide)
Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
spiral spring
(gcide)
Spring \Spring\, n. [AS. spring a fountain, a leap. See
Spring, v. i.]
1. A leap; a bound; a jump.
[1913 Webster]

The prisoner, with a spring, from prison broke.
--Dryden.
[1913 Webster]

2. A flying back; the resilience of a body recovering its
former state by its elasticity; as, the spring of a bow.
[1913 Webster]

3. Elastic power or force.
[1913 Webster]

Heavens! what a spring was in his arm! --Dryden.
[1913 Webster]

4. An elastic body of any kind, as steel, India rubber, tough
wood, or compressed air, used for various mechanical
purposes, as receiving and imparting power, diminishing
concussion, regulating motion, measuring weight or other
force.
[1913 Webster]

Note: The principal varieties of springs used in mechanisms
are the spiral spring (Fig. a), the coil spring
(Fig. b), the elliptic spring (Fig. c), the
half-elliptic spring (Fig. d), the volute spring,
the India-rubber spring, the atmospheric spring,
etc.
[1913 Webster]

5. Any source of supply; especially, the source from which a
stream proceeds; an issue of water from the earth; a
natural fountain. "All my springs are in thee." --Ps.
lxxxvii. 7. "A secret spring of spiritual joy." --Bentley.
"The sacred spring whence right and honor streams." --Sir
J. Davies.
[1913 Webster]

6. Any active power; that by which action, or motion, is
produced or propagated; cause; origin; motive.
[1913 Webster]

Our author shuns by vulgar springs to move
The hero's glory, or the virgin's love. --Pope.
[1913 Webster]

7. That which springs, or is originated, from a source; as:
(a) A race; lineage. [Obs.] --Chapman.
(b) A youth; a springal. [Obs.] --Spenser.
(c) A shoot; a plant; a young tree; also, a grove of
trees; woodland. [Obs.] --Spenser. Milton.
[1913 Webster]

8. That which causes one to spring; specifically, a lively
tune. [Obs.] --Beau. & Fl.
[1913 Webster]

9. The season of the year when plants begin to vegetate and
grow; the vernal season, usually comprehending the months
of March, April, and May, in the middle latitudes north of
the equator. "The green lap of the new-come spring."
--Shak.
[1913 Webster]

Note: Spring of the astronomical year begins with the vernal
equinox, about March 21st, and ends with the summer
solstice, about June 21st.
[1913 Webster]

10. The time of growth and progress; early portion; first
stage; as, the spring of life. "The spring of the day."
--1 Sam. ix. 26.
[1913 Webster]

O how this spring of love resembleth
The uncertain glory of an April day. --Shak.
[1913 Webster]

11. (Naut.)
(a) A crack or fissure in a mast or yard, running
obliquely or transversely.
(b) A line led from a vessel's quarter to her cable so
that by tightening or slacking it she can be made to
lie in any desired position; a line led diagonally
from the bow or stern of a vessel to some point upon
the wharf to which she is moored.
[1913 Webster]

Air spring, Boiling spring, etc. See under Air,
Boiling, etc.

Spring back (Bookbinding), a back with a curved piece of
thin sheet iron or of stiff pasteboard fastened to the
inside, the effect of which is to make the leaves of a
book thus bound (as a ledger or other account or blank
book) spring up and lie flat.

Spring balance, a contrivance for measuring weight or force
by the elasticity of a spiral spring of steel.

Spring beam, a beam that supports the side of a paddle box.
See Paddle beam, under Paddle, n.

Spring beauty.
(a) (Bot.) Any plant of the genus Claytonia, delicate
herbs with somewhat fleshy leaves and pretty
blossoms, appearing in springtime.
(b) (Zool.) A small, elegant American butterfly ({Erora
laeta}) which appears in spring. The hind wings of
the male are brown, bordered with deep blue; those of
the female are mostly blue.

Spring bed, a mattress, under bed, or bed bottom, in which
springs, as of metal, are employed to give the required
elasticity.

Spring beetle (Zool.), a snapping beetle; an elater.

Spring box, the box or barrel in a watch, or other piece of
mechanism, in which the spring is contained.

Spring fly (Zool.), a caddice fly; -- so called because it
appears in the spring.

Spring grass (Bot.), vernal grass. See under Vernal.

Spring gun, a firearm discharged by a spring, when this is
trodden upon or is otherwise moved.

Spring hook (Locomotive Engines), one of the hooks which
fix the driving-wheel spring to the frame.

Spring latch, a latch that fastens with a spring.

Spring lock, a lock that fastens with a spring.

Spring mattress, a spring bed.

Spring of an arch (Arch.) See Springing line of an arch,
under Springing.

Spring of pork, the lower part of a fore quarter, which is
divided from the neck, and has the leg and foot without
the shoulder. [Obs.] --Nares.

Sir, pray hand the spring of pork to me. --Gayton.

Spring pin (Locomotive Engines), an iron rod fitted between
the springs and the axle boxes, to sustain and regulate
the pressure on the axles.

Spring rye, a kind of rye sown in the spring; -- in
distinction from winter rye, sown in autumn.

Spring stay (Naut.), a preventer stay, to assist the
regular one. --R. H. Dana, Jr.

Spring tide, the tide which happens at, or soon after, the
new and the full moon, and which rises higher than common
tides. See Tide.

Spring wagon, a wagon in which springs are interposed
between the body and the axles to form elastic supports.


Spring wheat, any kind of wheat sown in the spring; -- in
distinction from winter wheat, which is sown in autumn.
[1913 Webster] Springald
SpringalSpiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
Spiral spring
(gcide)
Spring \Spring\, n. [AS. spring a fountain, a leap. See
Spring, v. i.]
1. A leap; a bound; a jump.
[1913 Webster]

The prisoner, with a spring, from prison broke.
--Dryden.
[1913 Webster]

2. A flying back; the resilience of a body recovering its
former state by its elasticity; as, the spring of a bow.
[1913 Webster]

3. Elastic power or force.
[1913 Webster]

Heavens! what a spring was in his arm! --Dryden.
[1913 Webster]

4. An elastic body of any kind, as steel, India rubber, tough
wood, or compressed air, used for various mechanical
purposes, as receiving and imparting power, diminishing
concussion, regulating motion, measuring weight or other
force.
[1913 Webster]

Note: The principal varieties of springs used in mechanisms
are the spiral spring (Fig. a), the coil spring
(Fig. b), the elliptic spring (Fig. c), the
half-elliptic spring (Fig. d), the volute spring,
the India-rubber spring, the atmospheric spring,
etc.
[1913 Webster]

5. Any source of supply; especially, the source from which a
stream proceeds; an issue of water from the earth; a
natural fountain. "All my springs are in thee." --Ps.
lxxxvii. 7. "A secret spring of spiritual joy." --Bentley.
"The sacred spring whence right and honor streams." --Sir
J. Davies.
[1913 Webster]

6. Any active power; that by which action, or motion, is
produced or propagated; cause; origin; motive.
[1913 Webster]

Our author shuns by vulgar springs to move
The hero's glory, or the virgin's love. --Pope.
[1913 Webster]

7. That which springs, or is originated, from a source; as:
(a) A race; lineage. [Obs.] --Chapman.
(b) A youth; a springal. [Obs.] --Spenser.
(c) A shoot; a plant; a young tree; also, a grove of
trees; woodland. [Obs.] --Spenser. Milton.
[1913 Webster]

8. That which causes one to spring; specifically, a lively
tune. [Obs.] --Beau. & Fl.
[1913 Webster]

9. The season of the year when plants begin to vegetate and
grow; the vernal season, usually comprehending the months
of March, April, and May, in the middle latitudes north of
the equator. "The green lap of the new-come spring."
--Shak.
[1913 Webster]

Note: Spring of the astronomical year begins with the vernal
equinox, about March 21st, and ends with the summer
solstice, about June 21st.
[1913 Webster]

10. The time of growth and progress; early portion; first
stage; as, the spring of life. "The spring of the day."
--1 Sam. ix. 26.
[1913 Webster]

O how this spring of love resembleth
The uncertain glory of an April day. --Shak.
[1913 Webster]

11. (Naut.)
(a) A crack or fissure in a mast or yard, running
obliquely or transversely.
(b) A line led from a vessel's quarter to her cable so
that by tightening or slacking it she can be made to
lie in any desired position; a line led diagonally
from the bow or stern of a vessel to some point upon
the wharf to which she is moored.
[1913 Webster]

Air spring, Boiling spring, etc. See under Air,
Boiling, etc.

Spring back (Bookbinding), a back with a curved piece of
thin sheet iron or of stiff pasteboard fastened to the
inside, the effect of which is to make the leaves of a
book thus bound (as a ledger or other account or blank
book) spring up and lie flat.

Spring balance, a contrivance for measuring weight or force
by the elasticity of a spiral spring of steel.

Spring beam, a beam that supports the side of a paddle box.
See Paddle beam, under Paddle, n.

Spring beauty.
(a) (Bot.) Any plant of the genus Claytonia, delicate
herbs with somewhat fleshy leaves and pretty
blossoms, appearing in springtime.
(b) (Zool.) A small, elegant American butterfly ({Erora
laeta}) which appears in spring. The hind wings of
the male are brown, bordered with deep blue; those of
the female are mostly blue.

Spring bed, a mattress, under bed, or bed bottom, in which
springs, as of metal, are employed to give the required
elasticity.

Spring beetle (Zool.), a snapping beetle; an elater.

Spring box, the box or barrel in a watch, or other piece of
mechanism, in which the spring is contained.

Spring fly (Zool.), a caddice fly; -- so called because it
appears in the spring.

Spring grass (Bot.), vernal grass. See under Vernal.

Spring gun, a firearm discharged by a spring, when this is
trodden upon or is otherwise moved.

Spring hook (Locomotive Engines), one of the hooks which
fix the driving-wheel spring to the frame.

Spring latch, a latch that fastens with a spring.

Spring lock, a lock that fastens with a spring.

Spring mattress, a spring bed.

Spring of an arch (Arch.) See Springing line of an arch,
under Springing.

Spring of pork, the lower part of a fore quarter, which is
divided from the neck, and has the leg and foot without
the shoulder. [Obs.] --Nares.

Sir, pray hand the spring of pork to me. --Gayton.

Spring pin (Locomotive Engines), an iron rod fitted between
the springs and the axle boxes, to sustain and regulate
the pressure on the axles.

Spring rye, a kind of rye sown in the spring; -- in
distinction from winter rye, sown in autumn.

Spring stay (Naut.), a preventer stay, to assist the
regular one. --R. H. Dana, Jr.

Spring tide, the tide which happens at, or soon after, the
new and the full moon, and which rises higher than common
tides. See Tide.

Spring wagon, a wagon in which springs are interposed
between the body and the axles to form elastic supports.


Spring wheat, any kind of wheat sown in the spring; -- in
distinction from winter wheat, which is sown in autumn.
[1913 Webster] Springald
SpringalSpiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
Spiral wheel
(gcide)
Spiral \Spi"ral\, a. [Cf. F. spiral. See Spire a winding
line.]
1. Winding or circling round a center or pole and gradually
receding from it; as, the spiral curve of a watch spring.
[1913 Webster]

2. Winding round a cylinder or imaginary axis, and at the
same time rising or advancing forward; winding like the
thread of a screw; helical.
[1913 Webster]

3. (Geom.) Of or pertaining to a spiral; like a spiral.
[1913 Webster]

Spiral gear, or Spiral wheel (Mach.), a gear resembling
in general a spur gear, but having its teeth cut at an
angle with its axis, or so that they form small portions
of screws or spirals.

Spiral gearing, a kind of gearing sometimes used in light
machinery, in which spiral gears, instead of bevel gears,
are used to transmit motion between shafts that are not
parallel.

Spiral operculum, an operculum whih has spiral lines of
growth.

Spiral shell, any shell in which the whorls form a spiral
or helix.

Spiral spring. See the Note under Spring, n., 4.
[1913 Webster]
Spirality
(gcide)
Spirality \Spi*ral"i*ty\, n.
The quality or states of being spiral.
[1913 Webster]
Spirally
(gcide)
Spirally \Spi"ral*ly\, adv.
In a spiral form, manner, or direction.
[1913 Webster]
Spiralozooid
(gcide)
Spiralozooid \Spi*ra`lo*zo"oid\, n. [Spiral + zooid. So called
because they often have a spiral form when contracted.]
(Zool.)
One of the special defensive zooids of certain hydroids. They
have the form of long, slender tentacles, and bear lasso
cells.
[1913 Webster]
Suspiral
(gcide)
Suspiral \Sus*pir"al\, n. [From Suspire.]
1. A breathing hole; a vent or ventiduct.
[1913 Webster]

2. A spring of water passing under ground toward a cistern or
conduit.
[1913 Webster]
Trichina spiralis
(gcide)
Trichina \Tri*chi"na\ (-n[.a]), n.; pl. Trichinae. [NL., fr.
Gr. ? hairy, made of hair, fr. tri`x, tricho`s, hair.]
(Zool.)
A small, slender nematoid worm (Trichina spiralis) which,
in the larval state, is parasitic, often in immense numbers,
in the voluntary muscles of man, the hog, and many other
animals. When insufficiently cooked meat containing the
larvae is swallowed by man, they are liberated and rapidly
become adult, pair, and the ovoviviparous females produce in
a short time large numbers of young which find their way into
the muscles, either directly, or indirectly by means of the
blood. Their presence in the muscles and the intestines in
large numbers produces trichinosis.
[1913 Webster]
Vallisneria spiralis
(gcide)
Tape \Tape\, n. [AS. t[ae]ppe a fillet. Cf. Tapestry,
Tippet.]
1. A narrow fillet or band of cotton or linen; a narrow woven
fabric used for strings and the like; as, curtains tied
with tape.
[1913 Webster]

2. A tapeline; also, a metallic ribbon so marked as to serve
as a tapeline; as, a steel tape.
[1913 Webster]

Red tape. See under Red.

Tape grass (Bot.), a plant (Vallisneria spiralis) with
long ribbonlike leaves, growing in fresh or brackish
water; -- called also fresh-water eelgrass, and, in
Maryland, wild celery.

Tape needle. See Bodkin, n., 4.
[1913 Webster]
deflationary spiral
(wn)
deflationary spiral
n 1: an episode of deflation in which prices and wages decrease
at an increasing rate and currency gains in value [ant:
inflationary spiral]
inflationary spiral
(wn)
inflationary spiral
n 1: an episode of inflation in which prices and wages increase
at an increasing rate and currency rapidly loses value
[ant: deflationary spiral]
macrozamia spiralis
(wn)
Macrozamia spiralis
n 1: large attractive palmlike evergreen cycad of New South
Wales [syn: burrawong, Macrozamia communis, {Macrozamia
spiralis}]
musculospiral nerve
(wn)
musculospiral nerve
n 1: largest branch of the brachial plexus; extends down the
humerus to the lateral epicondyle where it divides into one
branch that goes to the skin on the back of the hand and
another that goes to the underlying extensor muscles [syn:
radial nerve, nervus radialis, musculospiral nerve]
spiral bandage
(wn)
spiral bandage
n 1: an oblique bandage in which successive turns overlap
preceding turns
spiral galaxy
(wn)
spiral galaxy
n 1: a galaxy having a spiral structure; arms containing younger
stars spiral out from old stars at the center [syn: {spiral
galaxy}, spiral nebula]
spiral nebula
(wn)
spiral nebula
n 1: a galaxy having a spiral structure; arms containing younger
stars spiral out from old stars at the center [syn: {spiral
galaxy}, spiral nebula]
spiral ratchet screwdriver
(wn)
spiral ratchet screwdriver
n 1: a screwdriver with a ratchet (so the blade turns in only
one direction) and a spiral in the handle (so the blade
rotates) with downward pressure on the handle [syn: {spiral
ratchet screwdriver}, ratchet screwdriver]
spiral spring
(wn)
spiral spring
n 1: a spring that is wound like a spiral
spiral-shelled
(wn)
spiral-shelled
adj 1: having a shell that forms a spiral
spiraling
(wn)
spiraling
adj 1: in the shape of a coil [syn: coiling, helical,
spiral, spiraling, volute, voluted, whorled,
turbinate]
spirally
(wn)
spirally
adv 1: with spirals; "spirally fluted handles"
spiranthes spiralis
(wn)
Spiranthes spiralis
n 1: European orchid having shorter racemes of strongly
spiraling snow-white flowers [syn: {European ladies'
tresses}, Spiranthes spiralis]
trichinella spiralis
(wn)
Trichinella spiralis
n 1: parasitic nematode occurring in the intestines of pigs and
rats and human beings and producing larvae that form cysts
in skeletal muscles [syn: trichina, {Trichinella
spiralis}]
vallisneria spiralis
(wn)
Vallisneria spiralis
n 1: submerged aquatic plant with ribbonlike leaves; Old World
and Australia [syn: tape grass, eelgrass, {wild
celery}, Vallisneria spiralis]
spiral model
(foldoc)
spiral model

A software life-cycle model which supposes
incremental development, using the waterfall model for each
step, with the aim of managing risk. In the spiral model,
developers define and implement features in order of
decreasing priority.

[Barry Boehm, "A Spiral Model of Software Development and
Enhancement", ACM SIGSOFT Software Engineering Notes, August
1986].

[Barry Boehm "A Spiral Model of Software Development and
Enhancement" IEEE Computer, vol.21, #5, May 1988, pp 61-72].

[Better explanation?]

(1997-11-23)

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