quadric

Noun
Synonyms: quadric surface

Open English WordNet

Noun (1)

  1. a curve or surface whose equation (in Cartesian coordinates) is of the second degreeSynonyms: quadric surfaceType of curve, curved shapeKinds hyperboloid
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Webster's Dictionary (1913)

Quad′ric adjective

Mathematics Of or pertaining to the second degree.

Quad′ric noun

(a) Alg. A quantic of the second degree. See Quantic. (b) Geometry A surface whose equation in three variables is of the second degree. Spheres, spheroids, ellipsoids, paraboloids, hyperboloids, also cones and cylinders with circular bases, are quadrics.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54

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