quadrant


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quad·rant

 (kwŏd′rənt)
n.
1. Mathematics
a. A circular arc of 90°; one fourth of the circumference of a circle.
b. The plane area bounded by such an arc and two perpendicular radii.
c. Any of the four areas into which a plane is divided by the reference axes in a Cartesian coordinate system, designated first, second, third, and fourth, counting counterclockwise from the area in which both coordinates are positive.
2. A machine part or other mechanical device that is shaped like a quarter circle.
3. An early instrument for measuring altitude of celestial bodies, consisting of a 90° graduated arc with a movable radius for measuring angles.

[Middle English, quarter of a day, from Latin quadrāns, quadrant-, a fourth part; see kwetwer- in Indo-European roots.]

quadrant

(ˈkwɒdrənt)
n
1. (Mathematics) geometry
a. a quarter of the circumference of a circle
b. the area enclosed by two perpendicular radii of a circle and its circumference
c. any of the four sections into which a plane is divided by two coordinate axes
2. (Mechanical Engineering) a piece of a mechanism in the form of a quarter circle, esp one used as a cam or a gear sector
3. (Astronomy) an instrument formerly used in astronomy and navigation for measuring the altitudes of stars, consisting of a graduated arc of 90° and a sighting mechanism attached to a movable arm
[C14: from Latin quadrāns a quarter]
quadrantal adj

quad•rant

(ˈkwɒd rənt)

n.
1. a quarter of a circle; an arc of 90°.
2. the area included between such an arc and two radii drawn one to each extremity.
3. something shaped like a quarter of a circle, as a part of a machine.
4. one of the four parts into which a plane, as the face of a heavenly body, is divided by two perpendicular lines: the first quadrant of the moon.
5. an instrument, usu. containing a graduated arc of 90°, used in astronomy, navigation, etc., for measuring altitudes.
[1350–1400; Middle English < Latin quadrant-, s. of quadrāns fourth part]

quad·rant

(kwŏd′rənt)
1. An arc equal to one quarter of the circumference of a circle; an arc of 90°.
2. Any of the four regions into which a plane is divided by the axes of a Cartesian coordinate system. The quadrants are numbered counterclockwise one through four, beginning with the quadrant in which both the x- and y-coordinates are positive (usually the upper right quadrant).
3. An instrument with an arc of 90°, used to measure the angle between a celestial object and the horizon.

quadrant

- A quarter of a circle or sphere.
See also related terms for sphere.

quadrant

an instrument for measuring angular elevation, used in astronomy, navigation, surveying, etc., similar in principle to the sextant. — quadrantal, ad].
See also: Instruments
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.quadrant - a quarter of the circumference of a circle
line - a spatial location defined by a real or imaginary unidimensional extent
2.quadrant - any of the four areas into which a plane is divided by two orthogonal coordinate axes
area, country - a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography); "it was a mountainous area"; "Bible country"
3.quadrant - the area enclosed by two perpendicular radii of a circle
area, country - a particular geographical region of indefinite boundary (usually serving some special purpose or distinguished by its people or culture or geography); "it was a mountainous area"; "Bible country"
4.quadrant - a measuring instrument for measuring altitude of heavenly bodiesquadrant - a measuring instrument for measuring altitude of heavenly bodies
measuring device, measuring instrument, measuring system - instrument that shows the extent or amount or quantity or degree of something
Translations
kvadrantti
kvadrant

quadrant

[ˈkwɒdrənt] Ncuadrante m

quadrant

[ˈkwɒdrənt] nquadrant m

quadrant

nQuadrant m

quadrant

[ˈkwɒdrənt] nquadrante m

quad·rant

n. cuadrante, cuarta parte de un círculo.

quadrant

n cuadrante m; left lower — cuadrante inferior izquierdo right upper — cuadrante superior derecho
References in classic literature ?
Well that Ahab's quadrant was furnished with colored glasses, through which to take sight of that solar fire.
Under that, the miscellany began--a quadrant, a tin canikin, several sticks of tobacco, two brace of very handsome pistols, a piece of bar silver, an old Spanish watch and some other trinkets of little value and mostly of foreign make, a pair of compasses mounted with brass, and five or six curious West Indian shells.
Some time after, asking a friend at court how they came to fix on that determinate number, he told me that his majesty's mathematicians, having taken the height of my body by the help of a quadrant, and finding it to exceed theirs in the proportion of twelve to one, they concluded from the similarity of their bodies, that mine must contain at least 1724 of theirs, and consequently would require as much food as was necessary to support that number of Lilliputians.
Before long he knew where Disko kept the old green-crusted quadrant that they called the "hog-yoke" - under the bed-bag in his bunk.
He took a wife, as we have seen, to adorn the remaining quadrant of his course, and be a little moon that would cause hardly a calculable perturbation.
But the fourth quadrant, which contained the Red One's abiding place, was taboo.
Whenever this powdered and courteous old man, who never missed a Sunday at the convent chapel at Hammersmith, and who was in all respects, thoughts, conduct, and bearing utterly unlike the bearded savages of his nation, who curse perfidious Albion, and scowl at you from over their cigars, in the Quadrant arcades at the present day-- whenever the old Chevalier de Talonrouge spoke of Mistress Osborne, he would first finish his pinch of snuff, flick away the remaining particles of dust with a graceful wave of his hand, gather up his fingers again into a bunch, and, bringing them up to his mouth, blow them open with a kiss, exclaiming, Ah
He lost himself amongst advancing semi-circles, left- and right-hand quadrants, the curves of the tracks, the probable bearing of the centre, the shifts of wind and the readings of barometer.
The Gartner Magic Quadrant is a graphical representation of a marketplace at and for a specific time period.