/ Dictionary / Index P pyrrophyte: Meaning and Definition of Find definitions for: pyr•ro•phyte Pronunciation: (pir'u-fīt"), [key] — n. any of various single-celled, biflagellated algae, of the phylum Pyrrophyta, esp. the dinoflagellates. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Pyrrophyta pyruvate 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