\Sphe"roid\, n. [L. spheroides ball-like, spherical,
Gr. ???; ???? sphere + ??? form: cf. F. sph['e]ro["i]de.]
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}.