Definition from Wiktionary, the free dictionary
- sphæroid (archaic)
Audio (US) (file)
- Of a shape similar to a squashed sphere.
spheroid (plural spheroids)
- A solid of revolution generated by rotating an ellipse about its major (prolate), or minor (oblate) axis.
- UFOs are reported as being either oblate (saucer-shaped) or prolate (cigar-shaped) spheroids.