/ Dictionary / Index P photooxidation: Meaning and Definition of Find definitions for: pho•to•ox•i•da•tion Pronunciation: (fō"tō-ok"si-dā'shun), [key] — n. Chem. oxidation induced by light. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photo opportunity photopathy 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