quadric surface

English Thesaurus

1. a curve or surface whose equation (in Cartesian coordinates) is of the second degree (noun.shape)

hypernym	:	curve, curved shape,
definition	:	the trace of a point whose direction of motion changes (noun.shape)

hyponym	:	hyperboloid,
definition	:	a quadric surface generated by rotating a hyperbola around its main axis (noun.shape)