\Pa*rab"o*loid\ (-loid), n. [Parabola + -oid: cf. F.
parabolo["i]de.] (Geom.)
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.