Hypertext Webster Gateway: "quadric"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Quadric \Quad"ric\, a. (Math.)
Of or pertaining to the second degree.
From WordNet (r) 1.7 (wn)
quadric
n : a curve or surface whose equation (in Cartesian coordinates)
is of the second degree [syn: {quadric surface}]
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