quadrature noun. ['kwɒdrǝtʃǝ] LME.
[Old & mod. French, or Latin quadratura a square, act of squaring: see QUADRATE verb, -URE.]
1. Square shape, squareness. Also, a square formation. LME-M17.

2. Math. Calculation of the area bounded by or lying under a curve; the process of constructing a square equal in area to that of a given surface, esp. a circle. M16.

3. Astronomy. The aspect of a celestial object in the solar system (esp. the moon) when situated 90 degrees from the sun as seen from earth; the point (in space or time) at which this occurs. Also (Astrology), a similar aspect between any two planets, a square aspect. L16.

4. Electricity. A phase difference of 90 degrees. Usu. attrib. or in in quadrature (with). L19.

[TahlilGaran] English Dictionary ▲