QUADRATURE
\kwˈɒdɹət͡ʃə], \kwˈɒdɹətʃə], \k_w_ˈɒ_d_ɹ_ə_tʃ_ə]\
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A quadrate; a square.

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.

The position of one heavenly body in respect to another when distant from it 90Â¡, or a quarter of a circle, as the moon when at an equal distance from the points of conjunction and opposition.
By Oddity Software

A quadrate; a square.

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.

The position of one heavenly body in respect to another when distant from it 90Â¡, or a quarter of a circle, as the moon when at an equal distance from the points of conjunction and opposition.
By Noah Webster.

Act of squaring; act of finding a square of equal area with a given curvilinear figure; position of a heavenly body when 90Â° distant from another.
By William Hand Browne, Samuel Stehman Haldeman

n. The act of squaring or reducing to a square ; the finding of a square having the same area as a given curvilinear figure, as a circle; the position of one heavenly body in respect to another when distant from it ninety degrees ; hence, the first and last quarters of the moon.
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goldeneye
 largeheaded swiftflying diving duck of arctic regions a variety of green lacewing