spheroid

Although we have for convenience termed the earth a flattened spheroid, it is only such in a very general sense.

Its shape is not absolutely spherical, but spheroid—that is, flattened at the poles.

"He loves to call a football an 'illusive spheroid,'" chuckled another chap.

Pithos, pith′os, n. a large spheroid Greek earthenware vase.

The spores of this species are spheroid-tetrahedral, the three radiating angles marked with slender vittæ, or bands.