Paraboloid
Pronunciation : Pa*rab"o*loid
Part of Speech : n.
Etymology : [Parabola + -oid: cf. F. parabolo?de.] (Geom.)
Definition : Defn: The solid generated by the rotation of a parabola about its axis; any surface of the second order whose sections by planes parallel to a given line are parabolas.
Note: The term paraboloid has sometimes been applied also to the parabolas of the higher orders. Hutton.
Source : Webster's Unabridged Dictionary, 1913