Quad"ric (?), a. Math.
Of or pertaining to the second degree.
© Webster 1913.
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.
© Webster 1913.