/ Dictionary / Index F flash photolysis: Meaning and Definition of Find definitions for: flash' photol'ysis Pronunciation: [key] — Chem. Chem. the study of photochemical reaction mechanisms in gases by analyzing spectroscopically the reaction products in a gas mixture irradiated with a powerful light flash. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. flash photography flash picture Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language