In mathematics, a quadric, or quadric surface, is any D-dimensional hypersurface in (D + 1)-dimensional space defined as the locus of zeros of a quadratic polynomial. In coordinates }, the general quadric is defined by the algebraic equation (External Link), Quadrics in Geometry Formulas and Facts by Silvio Levy, excerpted from 30th Edition of the CRC Standard Mathematical Tables and Formulas (CRC Press). » sum_ Consequently, the ellipsoid, the elliptic paraboloid and the hyperboloid of two sh… (More on Quadric)