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Definition of: protist
(prō′tist) noun Biol.
1. Any unicellular organism, whether animal or plant.
2. Formerly, any member of a large division (Protista) including all single-celled organisms. [<NL <Gk. prōtista, neut. plural of prōtistos the very first, superl. of prōtos first]
—pro·tis′tan adjective & noun
—pro·tis′tic adjective
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