/ Dictionary / Index P Protista: Meaning and Definition of Find definitions for: Pro•tis•ta Pronunciation: (prō-tis'tu), [key] — n. (used with a pl. v.) Biol. a taxonomic kingdom comprising the protists. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: protista (Thesaurus) protist protistology Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language