prolate
1. [ adjective ] having the polar diameter greater than the equatorial diameter
Synonyms: watermelon-shaped
Examples:

"a prolate spheroid is generated by revolving an ellipse about its major axis"

Related terms: oblate rounded
2. [ adjective ] rounded like an egg
Synonyms: oval elliptic elliptical ovate oviform ovoid egg-shaped
Related terms: rounded
Similar spelling:   prelate
  prelature
  prelude