/ Dictionary / Index P photochromy: Meaning and Definition of Find definitions for: pho•to•chro•my Pronunciation: (fō'tu-krō"mē), [key] — n. a former technique of color photography. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photochromic photochronograph Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language