Sphe″roid (?), n. [L. spheroides ball-like, spherical, Gr. ���; ���� sphere + ��� form: cf. F. sphéroïde.] A body or figure approaching to a sphere, but not perfectly spherical; esp., a solid generated by the revolution of an ellipse about one of its axes.
Oblate spheroid, Prolate spheroid. See Oblate, Prolate, and Ellipsoid.