quadrature

n. 求面积, 正交, 弦
【计】 正交

quad.ra.ture

n.（名词）
The process of making something square.
使某物成方形的过程
Mathematics The process of constructing a square equal in area to a given surface.
【数学】 求面积：画一个与所给平面面积相等的四方形的过程
Astronomy A configuration in which the position of one celestial body is 90= from another celestial body, as measured from a third.
【天文学】 方照：一种布局，其中某天体的位置与另一天体成90度，如从第三天体测量