**Definition:** 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.

**Definition:** A quadrate; a square.

**Definition:** 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.

**Definition:** 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.