/ Dictionary / Index P photophore: Meaning and Definition of Find definitions for: pho•to•phore Pronunciation: (fō'tu-fôr", -fōr"), [key] — n. Zool. a luminous organ found in certain fishes and crustaceans. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photophobic photophosphorylation Related Content Daily Word Quiz: simian Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language