/ Dictionary / Index P Pyrrophyta: Meaning and Definition of Find definitions for: Pyr•roph•y•ta Pronunciation: (pi-rof'i-tu), [key] — n. Biol. a phylum in the kingdom Protista comprising the dinoflagellates and cryptomonads. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pyrrophyta (Thesaurus) pyrrolidine pyrrophyte Related Content Daily Word Quiz: portent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language