/ Dictionary / Index P photoelectron: Meaning and Definition of Find definitions for: pho•to•e•lec•tron Pronunciation: (fō"tō-i-lek'tron), [key] — n. Physics. an electron emitted from a system by the photoelectric effect. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: photoelectron (Thesaurus) photoelectric tube photoelectrotype Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language