HELIOZOA

Heliozoa, order Heliozoa

(noun) mostly freshwater protozoa

HELIOZOAN

heliozoan

(noun) protozoa with spherical bodies and stiff radiating pseudopods

Source: WordNet® 3.1

He`li*o*zo"a, n. pl. Etym: [NL., fr. Gr. (Zoöl.)

Definition: An order of fresh-water rhizopods having a more or less globular form, with slender radiating pseudopodia; the sun animalcule.

Source: Webster’s Unabridged Dictionary 1913 Edition