Quadric \Quad"ric\, a. (Math.)
   Of or pertaining to the second degree.
   [1913 Webster]

	

	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]

	

	quadric
    n 1: a curve or surface whose equation (in Cartesian
         coordinates) is of the second degree [syn: quadric,
         quadric surface]