slovodefinícia
quadrant
(encz)
quadrant,kvadrant n: Milan Svoboda
quadrant
(gcide)
Octant \Oc"tant\, n. [L. octans, -antis. fr. octo eight. See
Octave.]
1. (Geom.) The eighth part of a circle; an arc of 45 degrees.
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2. (Astron. & Astrol.) The position or aspect of a heavenly
body, as the moon or a planet, when half way between
conjunction, or opposition, and quadrature, or distant
from another body 45 degrees.
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3. An instrument for measuring angles (generally called a
quadrant), having an arc which measures up to 9O[deg],
but being itself the eighth part of a circle. Cf.
Sextant.
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4. (Math. & Crystallog.) One of the eight parts into which a
space is divided by three coordinate planes.
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Quadrant
(gcide)
Quadrant \Quad"rant\, n. [L. quadrans, -antis, a fourth part, a
fourth of a whole, fr. quattuor four: cf. F. quadrant,
cadran. See Four, and cf. Cadrans.]
1. The fourth part; the quarter. [Obs.] --Sir T. Browne.
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2. (Geom.) The quarter of a circle, or of the circumference
of a circle, an arc of 90[deg], or one subtending a right
angle at the center.
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3. (Anal. (Geom.) One of the four parts into which a plane is
divided by the coordinate axes. The upper right-hand part
is the first quadrant; the upper left-hand part the
second; the lower left-hand part the third; and the lower
right-hand part the fourth quadrant.
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4. An instrument for measuring altitudes, variously
constructed and mounted for different specific uses in
astronomy, surveying, gunnery, etc., consisting commonly
of a graduated arc of 90[deg], with an index or vernier,
and either plain or telescopic sights, and usually having
a plumb line or spirit level for fixing the vertical or
horizontal direction.
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Gunner's quadrant, an instrument consisting of a graduated
limb, with a plumb line or spirit level, and an arm by
which it is applied to a cannon or mortar in adjusting it
to the elevation required for attaining the desired range.


Gunter's quadrant. See Gunter's quadrant, in the
Vocabulary.

Hadley's quadrant, a hand instrument used chiefly at sea to
measure the altitude of the sun or other celestial body in
ascertaining the vessel's position. It consists of a frame
in the form of an octant having a graduated scale upon its
arc, and an index arm, or alidade pivoted at its apex.
Mirrors, called the index glass and the horizon glass, are
fixed one upon the index arm and the other upon one side
of the frame, respectively. When the instrument is held
upright, the index arm may be swung so that the index
glass will reflect an image of the sun upon the horizon
glass, and when the reflected image of the sun coincides,
to the observer's eye, with the horizon as seen directly
through an opening at the side of the horizon glass, the
index shows the sun's altitude upon the scale; -- more
properly, but less commonly, called an octant.

Quadrant of altitude, an appendage of the artificial globe,
consisting of a slip of brass of the length of a quadrant
of one of the great circles of the globe, and graduated.
It may be fitted to the meridian, and being movable round
to all points of the horizon, serves as a scale in
measuring altitudes, azimuths, etc.
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quadrant
(wn)
quadrant
n 1: a quarter of the circumference of a circle [syn:
quadrant, quarter-circle]
2: any of the four areas into which a plane is divided by two
orthogonal coordinate axes
3: the area enclosed by two perpendicular radii of a circle
4: a measuring instrument for measuring altitude of heavenly
bodies
QUADRANT
(bouvier)
QUADRANT. In angular measures, a quadrant is equal to ninety degrees. Vide
Measure.

podobné slovodefinícia
quadrantanopia
(encz)
quadrantanopia, n:
quadrantid
(encz)
Quadrantid,jedno ze souhvězdí Pavel Machek
quadrants
(encz)
quadrants,kvadranty n: pl. Milan Svoboda
Earth quadrant
(gcide)
Earth \Earth\ ([~e]rth), n. [AS. eor[eth]e; akin to OS. ertha,
OFries. irthe, D. aarde, OHG. erda, G. erde, Icel.
j["o]r[eth], Sw. & Dan. jord, Goth. a[imac]r[thorn]a, OHG.
ero, Gr. ?, adv., to earth, and perh. to E. ear to plow.]
1. The globe or planet which we inhabit; the world, in
distinction from the sun, moon, or stars. Also, this world
as the dwelling place of mortals, in distinction from the
dwelling place of spirits.
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That law preserves the earth a sphere
And guides the planets in their course. --S. Rogers.
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In heaven, or earth, or under earth, in hell.
--Milton.
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2. The solid materials which make up the globe, in
distinction from the air or water; the dry land.
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God called the dry land earth. --Gen. i. 10.
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He is pure air and fire, and the dull elements of
earth and water never appear in him. --Shak.
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3. The softer inorganic matter composing part of the surface
of the globe, in distinction from the firm rock; soil of
all kinds, including gravel, clay, loam, and the like;
sometimes, soil favorable to the growth of plants; the
visible surface of the globe; the ground; as, loose earth;
rich earth.
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Give him a little earth for charity. --Shak.
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4. A part of this globe; a region; a country; land.
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Would I had never trod this English earth. --Shak.
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5. Worldly things, as opposed to spiritual things; the
pursuits, interests, and allurements of this life.
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Our weary souls by earth beguiled. --Keble.
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6. The people on the globe.
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The whole earth was of one language. --Gen. xi. 1.
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7. (Chem.)
(a) Any earthy-looking metallic oxide, as alumina,
glucina, zirconia, yttria, and thoria.
(b) A similar oxide, having a slight alkaline reaction, as
lime, magnesia, strontia, baryta.
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8. A hole in the ground, where an animal hides himself; as,
the earth of a fox. --Macaulay.
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They [ferrets] course the poor conies out of their
earths. --Holland.
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9. (Elec.) The connection of any part an electric conductor
with the ground; specif., the connection of a telegraph
line with the ground through a fault or otherwise.

Note: When the resistance of the earth connection is low it
is termed a good earth.
[Webster 1913 Suppl.]

Note: Earth is used either adjectively or in combination to
form compound words; as, earth apple or earth-apple;
earth metal or earth-metal; earth closet or
earth-closet.
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Adamic earth, Bitter earth, Bog earth, Chian earth,
etc. See under Adamic, Bitter, etc.

Alkaline earths. See under Alkaline.

Earth apple. (Bot.)
(a) A potato.
(b) A cucumber.

Earth auger, a form of auger for boring into the ground; --
called also earth borer.

Earth bath, a bath taken by immersing the naked body in
earth for healing purposes.

Earth battery (Physics), a voltaic battery the elements of
which are buried in the earth to be acted on by its
moisture.

Earth chestnut, the pignut.

Earth closet, a privy or commode provided with dry earth or
a similar substance for covering and deodorizing the
f[ae]cal discharges.

Earth dog (Zo["o]l.), a dog that will dig in the earth, or
enter holes of foxes, etc.

Earth hog, Earth pig (Zo["o]l.), the aard-vark.

Earth hunger, an intense desire to own land, or, in the
case of nations, to extend their domain.

Earth light (Astron.), the light reflected by the earth, as
upon the moon, and corresponding to moonlight; -- called
also earth shine. --Sir J. Herschel.

Earth metal. See 1st Earth, 7. (Chem.)

Earth oil, petroleum.

Earth pillars or Earth pyramids (Geol.), high pillars or
pyramids of earth, sometimes capped with a single stone,
found in Switzerland. --Lyell.

Earth pitch (Min.), mineral tar, a kind of asphaltum.

Earth quadrant, a fourth of the earth's circumference.

Earth table (Arch.), the lowest course of stones visible in
a building; the ground table.

On earth, an intensive expression, oftenest used in
questions and exclamations; as, What on earth shall I do?
Nothing on earth will satisfy him. [Colloq.]
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