/ Dictionary / Index P phytohormone: Meaning and Definition of Find definitions for: phy•to•hor•mone Pronunciation: (fī"tu-hôr'mōn), [key] — n. hormone (def. 3). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: phytohormone (Thesaurus) phytography phytol Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language