AskDefine | Define quadrature

Dictionary Definition

quadrature n : the construction of a square having the same area as some other figure

User Contributed Dictionary



  1. the process of making something square; squaring
  2. the process of constructing a square having the same area as a given plane figure, or of computing that area
  3. a situation in which three celestial bodies form a right-angled triangle
  4. the condition in which the phase angle between two alternating quantities is 90°

Derived terms


  • German: Quadrieren
  • German: Quadratur
  • German: Quadratur
physics: condition in which the phase angle is 90 degrees
  • Korean: 직교



  1. Plural of quadratura

Extensive Definition

Quadrature, derived from Latin quadrare, may refer to:
In signal processing:
In mathematics:
  • Quadrature of the circle (also squaring the circle), in geometry, the problem of constructing a square and circle of equal area, impossible using only an unmarked straight-edge and compass
  • Summing in quadrature means summing the squares of numbers, then taking the square root, as used in error analysis
  • Numerical quadrature, the numerical calculation of the area under a curve, or more generally, using numerical integration to calculate a definite integral
Quadrature may also refer to:
  • In motion control, quadrature encoder is a rotary encoder or linear encoder giving both the relative position and the direction of motion of a shaft
  • In astronomy, quadrature occurs when two celestial bodies appear 90° apart from one another as viewed from a third celestial body. As an example, the Moon and the Sun are in quadrature with respect to the Earth when the Moon is in its exact first quarter or last quarter phases. The symbol for astronomical quadrature is a hollow square
quadrature in German: Quadratur (Begriffsklärung)
quadrature in Spanish: Cuadratura
quadrature in French: Quadrature
quadrature in Italian: Quadratura
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