/ Dictionary / Index P phototropic: Meaning and Definition of Find definitions for: pho•to•trop•ic Pronunciation: (fō"tu-trop'ik, -trō'pik), [key] — adj. Bot. growing toward or away from the light. taking a particular direction under the influence of light. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. phototrophic bacteria phototropism Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language