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Definition of quadric:
1. A quantic of the second degree. See Quantic.
2. 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.
3. Of or pertaining to the second degree.
Synonyms:
quadric surface
See how do you define quadric. See quadric definition.