Quad·ric a. Math. Of or pertaining to the second degree.
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.
n : a curve or surface whose equation (in Cartesian coordinates)
is of the second degree [syn: quadric surface]