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1. (n.) quadrature
the act of squaring.
2. quadrature
the act or process of finding a square equal in area to a given surface, esp. a surface bounded by a curve.
3. quadrature
a definite integral.
4. quadrature
the situation of two heavenly bodies when their longitudes differ by 90°.
5. quadrature
either of the two points in the orbit of a body, as the moon, midway between the syzygies.
Etymology: (1545–55; < L quadrātūra =quadrāt(us), ptp. of quadrāre (see quadrate ) +-ūra -ure)
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| Definition of 'quadrature' |
Princeton's WordNet |
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1. (noun) quadrature
the construction of a square having the same area as some other figure
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| Definition of 'quadrature' |
Webster Dictionary |
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1. (adj) quadrature
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. (adj) quadrature
a quadrate; a square
3. (adj) quadrature
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. (adj) quadrature
the position of one heavenly body in respect to another when distant from it 90¡, or a quarter of a circle, as the moon when at an equal distance from the points of conjunction and opposition.
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| Definition of 'quadrature' |
The Standard Electrical Dictionary |
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1. quadrature
Waves or periodic motions the angle of lag of one of which, with reference to one in advance of it, is 90°, are said to be in quadrature with each other.
[Transcriber's note: If the voltage and current of a power line are in quadrature, the power factor is zero (cos(90°) = 0) and no real power is delivered to the load.]
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Definitions of quadrature 
