Quadrature Quad"ra*ture, n. [L. quadratura: cf. F. quadrature. See {Quadrate}, a.] 1. (Math.) The act of squaring; the finding of a square having the same area as some given curvilinear figure; as, the quadrature of a circle; the operation of finding an expression for the area of a figure bounded wholly or in part by a curved line, as by a curve, two ordinates, and the axis of abscissas. [1913 Webster]

2. A quadrate; a square. --Milton. [1913 Webster]

3. (Integral Calculus) The integral used in obtaining the area bounded by a curve; hence, the definite integral of the product of any function of one variable into the differential of that variable. [1913 Webster]

4. (Astron.) The position of one heavenly body in respect to another when distant from it 90[deg], or a quarter of a circle, as the moon when at an equal distance from the points of conjunction and opposition. [1913 Webster]

{Quadrature of the moon} (Astron.), the position of the moon when one half of the disk is illuminated.

{Quadrature of an orbit} (Astron.), a point in an orbit which is at either extremity of the latus rectum drawn through the empty focus of the orbit. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

### Look at other dictionaries:

• Orbit of the Moon — Not to be confused with Lunar orbit in the sense of a selenocentric orbit, that is, an orbit around the Moon The Moon completes its orbit around the Earth in approximately 27.3 days (a sidereal month). The Earth and Moon orbit about their… …   Wikipedia

• Quadrature of an orbit — Quadrature Quad ra*ture, n. [L. quadratura: cf. F. quadrature. See {Quadrate}, a.] 1. (Math.) The act of squaring; the finding of a square having the same area as some given curvilinear figure; as, the quadrature of a circle; the operation of… …   The Collaborative International Dictionary of English

• Quadrature — Quad ra*ture, n. [L. quadratura: cf. F. quadrature. See {Quadrate}, a.] 1. (Math.) The act of squaring; the finding of a square having the same area as some given curvilinear figure; as, the quadrature of a circle; the operation of finding an… …   The Collaborative International Dictionary of English

• Quadrature — Quadrature, derived from Latin quadrare , may refer to:In signal processing: *Quadrature amplitude modulation (QAM), a modulation method of using both a carrier wave and a quadrature carrier wave that is 90° out of phase with the main carrier… …   Wikipedia

• quadrature — /kwod reuh cheuhr, choor /, n. 1. the act of squaring. 2. Math. a. the act or process of finding a square equal in area to a given surface, esp. a surface bounded by a curve. b. the act or process of finding an area or calculating an integral,… …   Universalium

• quadrature — /ˈkwɒdrətʃə / (say kwodruhchuh) noun 1. the act of squaring. 2. the act or process of finding a square equal in area to a given surface, especially a surface bounded by a curve. 3. Astronomy a. the situation of two heavenly bodies when their… …   Australian English dictionary

• quadrature — [ kwɒdrətʃə] noun 1》 Mathematics the process of constructing a square with an area equal to that of a circle or other curved figure. 2》 Astronomy the position of the moon or a planet when 90° from the sun in the sky. 3》 Electronics a phase… …   English new terms dictionary

• quadrature — [kwä′drə chər] n. [LL quadratura < L quadratus: see QUADRATE] 1. the act of squaring 2. the construction of a square equal in area to a given surface [the quadrature of a circle] 3. Astron. a configuration of a superior planet or the moon in… …   English World dictionary

• moon — /mun / (say moohn) noun 1. (often upper case) the body which revolves around the earth monthly at a mean distance of 384 403 km, accompanying the earth in its annual revolution about the sun. It is 3476 km in diameter, and its mass is 0.0123 that …   Australian English dictionary

• quadrature — noun a) the process of making something square; squaring When the Moon is in quadrature, it appears in the sky as a half moon. b) [ …   Wiktionary