单词	hyperboloid
释义	hyperboloid /hʌɪˈpəːbəlɔɪd / noun A solid or surface having plane sections that are hyperbolas, ellipses, or circles.In the vicinity of point M, we assume that the surface of the hyperboloid is a plane.... Out of this work came another of Wren's important mathematical results, namely that the hyperboloid of revolution is a ruled surface. In 1826 he generalised his theorem to a hyperboloid of revolution, rather than a cone. Derivatives hyperboloidal adjective ... He has a Parisian optician produce hyperboloidal lenses for a demonstration, but the lenses are a failure. These members complete the hyperboloidal structural connections to make the new structural principle operate. For general hyperboloidal gears, let us now calculate and in the same way in terms of the velocity ratio.
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