- orbiculate, orbicular - circular or nearly circular
Antonym: compound (indirect, via simple)
- ball-shaped, global, globose, globular, orbicular, spheric, spherical - having the shape of a sphere or ball; "a spherical object"; "nearly orbicular in shape"; "little globular houses like mud-wasp nests"- Zane Grey
Antonym: square (indirect, via round)