QUADRATURE (from Lat. quadratura, a making square)

This article appears in Volume V22, Page 706 of the Encyclopedia Britannica.

Encyclopedia Britannica - Main :: PYR-RAY

QUADRATURE (from Lat. quadratura, a making square) , in astronomy, that aspect of a heavenly

body

BODY

in which it makes a right

angle

ANGLE (from the Lat. angulus, a corner, a diminutive, of which the
primitive
- PRIMITIVE
form,
angus
- ANGUS, EARLS OF
, does not occur in Latin; cognate are the Lat. angere, to compress into a
bend
- BEND
or to strangle, and the Gr. ayKOS, a
bend
- BEND
; both connected with the
Aryan
- ARYAN
root
- ROOT (late O.E. rot, adopted from Scand., cf. Norw. and Swed. rot, Dan. rod; the true O.E. word was wyrt, plant, represented in Ger. Wurz or Wurzel; the ultimate root is the same in both words, and is seen in Lat. radix)
- ROOT, ELIHU (1845– )
ank-, to

with the direction of the sun; applied especially to the apparent position of a

planet

PLANET (Gr. ssXavirrns, a wanderer)

, or of the moon at first and last quarters. In

mathematics

MATHEMATICS (Gr. /saBnµar1Kil, Sc. vOcvn or E7rlQTt'µn; from p iN.La, "learning" or "science ")

, quadrature is the determination of a square equal to the area of a

curve

CURVE (Lat. curvus, bent)

or other figure.

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