/ Dictionary / Index P photodynamics: Meaning and Definition of Find definitions for: pho•to•dy•nam•ics Pronunciation: (fō"tō-dī-nam'iks), [key] — n. (used with a sing. v.) the science dealing with light and its effects on living organisms. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photoduplicate photoelasticity Related Content Daily Word Quiz: serendipity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language