Ellipsoid /(?)/

El·lip·soid

Ellipsoid

n.
  1. A solid, all plane sections of which are ellipses or circles. See Conoid, n., 2 (a). (Geom.)

Phrases & Compounds
Ellipsoid of revolution
a spheroid; a solid figure generated by the revolution of an ellipse about one of its axes. It is called a prolate spheroid, or prolatum, when the ellipse is revolved about the major axis, and an oblate spheroid, or oblatum, when it is revolved about the minor axis.

Ellipsoid

a.
  1. Pertaining to, or shaped like, an ellipsoid; as, ellipsoid or ellipsoidal form.