[kwod-ruh-cher, -choo r] /ˈkwɒd rə tʃər, -ˌtʃʊər/
noun
1.
the act of squaring.
2.
Mathematics.
1. the act or process of finding a square equal in area to a given surface, especially a surface bounded by a curve.
2. the act or process of finding an area or calculating an integral, especially by numerical methods.
3. a definite integral.
3.
Astronomy.
1. the situation of two heavenly bodies when their longitudes differ by 90°.
2. either of the two points in the orbit of a body, as the moon, midway between the syzygies.
3. (of the moon) those points or moments at which a half moon is visible.
4.
Electronics. the relation between two signals having the same frequency that differ in phase by 90°.
1545-1555
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for quadrature
Historical Examples
• Rectification and quadrature of the circle have thus been, since the time of Archimedes at least, practically identical problems.

• More curious than his quadrature is his name; what are we to make of it?

Augustus De Morgan
• Such ideas are evidently akin to the poetic notion of the quadrature.

• His attempt to prove the impossibility of the quadrature appeared in 1645.

Augustus De Morgan
• But such things as the quadrature of the circle, etc., are never put down.

Augustus de Morgan
• He carried the quadrature of the circle to 120 decimal places.

Joel Munsell
• After satisfying him that nothing had ever been offered here, I discussed his quadrature, which was of no use.

Augustus De Morgan
• He is the author of a method of determining the quadrature of the circle.

Joel Munsell
• Then it can be shown that one solution of the complete system is determinable by a quadrature.

• All next week it is moving against the same extra pull, and so arrives at quadrature (half moon) somewhat late.

Oliver Lodge

/ˈkwɒdrətʃə/
noun
1.
(maths) the process of determining a square having an area equal to that of a given figure or surface
2.
the process of making square or dividing into squares
3.
(astronomy) a configuration in which two celestial bodies, usually the sun and the moon or a planet, form an angle of 90° with a third body, usually the earth
4.
(electronics) the relationship between two waves that are 90° out of phase
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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 quadrature   (kwŏd'rə-chr')    The process of constructing a square equal in area to a given surface.A configuration in which the position of one celestial body is 90° from another celestial body, as measured from a third. For example, the half moon lies in quadrature from the Sun when Earth is the reference point. See more at elongation.
The American Heritage® Science Dictionary
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