hy.per.bo.la
n.（名词）【复数】 hy.per.bo.las 或 hy.per.bo.lae [-lô] 【数学】 A plane curve having two branches, formed by the intersection of a plane with both halves of a right circular cone at an angle parallel to the axis of the cone. It is the locus of points for which the difference of the distances from two given points is a constant.双曲线：有两条分支的一个平面曲线，由一个平面与一个直立的圆锥以与锥的中轴相平行的角度相切而成，它是切点的轨迹，在这个轨迹上任何点与给定的两点之间的距离变化是个常数
来源：New Latin 现代拉丁语 from Greek huperbolô [a throwing beyond, excess (from the relationship between the line joining the vertices of a conic and the line through its focus and parallel to its directrix)] * see hyperbole 源自 希腊语 huperbolô [向上抛线，超过（从连结二次曲线顶点的线和通过其中心亦与线平行的线之间的关系）] *参见 hyperbole
