/ Dictionary / Index P photolyze: Meaning and Definition of Find definitions for: pho•to•lyze Pronunciation: (fōt'l-īz"), [key] — v., -lyzed, -lyz•ing. —v.t. to break down molecules with light. —v.i. to experience photolysis. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photolysis photom. Related Content Daily Word Quiz: laudable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language