Sphē'roid, n.

(Synop., § 130), n. [Fr. sphéroïde, from Lat. sphæroides, Gr. σφαιροειδής, ball like, spherical, from σφαῖρα, sphere, and εἶδος, form.] A body or figure approaching to a sphere, but not perfectly spherical; especially, a solid generated by the revolution of an ellipse about one of its axes.

Oblate spheroid. See OBLATE.—Prolate spheroid. See PROLATE.