1.
[syn: quadric, quadric surface]
The Collaborative International Dictionary of English v.0.48:
Quadric \Quad"ric\, a. (Math.)
Of or pertaining to the second degree.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Quadric \Quad"ric\, n.
(a) (Alg.) A quantic of the second degree. See Quantic.
(b) (Geom.) 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.
[1913 Webster]
WordNet (r) 3.0 (2006):
quadric
n 1: a curve or surface whose equation (in Cartesian
coordinates) is of the second degree [syn: quadric,
quadric surface]