/ Dictionary / Index P phytotoxin: Meaning and Definition of Find definitions for: phy•to•tox•in Pronunciation: (fī"tu-tok'sin), [key] — n. any toxin, as ricin or crotin, produced by a plant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phytotoxin (Thesaurus) phytotoxic pi 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