QUADRATURES
Noun
quadratures
plural of quadrature
Source: Wiktionary
QUADRATURE
Quad"ra*ture, n. Etym: [L. quadratura: cf. F. quadrature. See
Quadrate, a.]
1. (Math.)
Definition: 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.
2. A quadrate; a square. Milton.
3. (Integral Calculus)
Definition: 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.
4. (Astron.)
Definition: The position of one heavenly body in respect to another when
distant from it 90ΒΊ, or a quarter of a circle, as the moon when at an
equal distance from the points of conjunction and opposition.
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.
Source: Webster’s Unabridged Dictionary 1913 Edition