/ Dictionary / Index P photodiode: Meaning and Definition of Find definitions for: pho•to•di•ode Pronunciation: (fō'tō-dī"ōd), [key] — n. Electronics. a photosensitive semiconductor diode. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photodetector photodisintegration Related Content Daily Word Quiz: feline Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language