spheroid

A body that is shaped like a sphere but is not perfectly round, especially an ellipsoid that is generated by revolving an ellipse around one of its axes.

In anthropology, a cranium of nearly spherical form.

A geometrical body approaching to a sphere, but not perfectly spherical.

In geometry, a solid generated by the revolution of an ellipse about one of its axes.

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.