| 释义 |
Definition of parabolic point in English: parabolic pointnoun Geometry (Originally) a point on a surface at which the indicatrix is a parabola, i.e. where a plane parallel to, and an infinitesimal distance from, the tangent plane at that point intersects the surface in a parabola; (now) a point on a surface at which the Gaussian curvature is zero.
Origin Mid 19th century; earliest use found in William T. Brande (1788–1866), chemist. Definition of parabolic point in US English: parabolic pointnoun Geometry (Originally) a point on a surface at which the indicatrix is a parabola, i.e. where a plane parallel to, and an infinitesimal distance from, the tangent plane at that point intersects the surface in a parabola; (now) a point on a surface at which the Gaussian curvature is zero.
Origin Mid 19th century; earliest use found in William T. Brande (1788–1866), chemist. |