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Any of various aquatic, chiefly freshwater protozoans formerly classified in the class Heliozoa, characteristically having numerous spindlelike pseudopods that radiate from a central cell mass.
[From New Latin Hēliozōa, former class name : helio- (from their shape) + -zōa, pl. of -zōon, -zoon.]
he′li·o·zo′ic (-zō′ĭk) adj.
(Animals) any protozoan of the mostly freshwater group Heliozoa, typically having a siliceous shell and stiff radiating cytoplasmic projections: phylum Actinopoda (actinopods)
he•li•o•zo•an(ˌhi li əˈzoʊ ən)
1. any protozoan of the order Heliozoa, having a spherical body and radiating pseudopodia.adj.
2. Also, he`li•o•zo′ic. of or pertaining to the heliozoans.