D defs.my
Entry 1 sense Webster, 1913

Spheroid

/sfĭr'-oidˌ/ · Sphe·roid · IPA /sfˈɪrˌɔɪd/
01 n. 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…
  1. 1.
    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.
Phrases & compounds
Oblate spheroid — See Oblate, Prolate, and Ellipsoid.