“conicoid”的英文意思_释义_用法

单词

conicoid

释义

conicoid Geom.|ˈkɒnɪkɔɪd|
[f. conic + -oid, after ellipsoid, etc.]
In Solid Geometry: A surface of which every plane section is a conic (see conic B. 2); a surface of the second degree, a quadric surface or quadric: e.g. a sphere, ellipsoid, cone, paraboloid, or hyperboloid.
1863Frost & Wolstenholme Solid Geom. §204 A surface of the second degree shall in future be denominated a Conicoid.Ibid. §205 Properties of conicoids, etc.1865W. S. Aldis Solid Geom. v. §52 Surfaces whose equations are of the second degree in (x, y, z) are called Quadrics, or, following the analogy of the terms ellipsoid, etc., Conicoids.1880G. S. Carr Synopsis I. §5599 A conicoid is a surface every plane section of which is a conic.

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