单词 | hyperbola |
释义 | hyperbola /huy perr"beuh leuh/, n. Geom. the set of points in a plane whose distances to two fixed points in the plane have a constant difference; a curve consisting of two distinct and similar branches, formed by the intersection of a plane with a right circular cone when the plane makes a greater angle with the base than does the generator of the cone. Equation: x2/a2 - y2/b2 = ±1. See diag. under conic section. [1660-70; < NL < Gk hyperbolé the geometrical term, lit., excess. See HYPERBOLE] |
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