/ Dictionary / Index P photism: Meaning and Definition of Find definitions for: pho•tism Pronunciation: (fō'tiz-um), [key] — n. Psychol. a form of synesthesia in which a visual sensation, as of color or form, is produced by the sense of touch, hearing, etc. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. photinia Photius Related Content Daily Word Quiz: fidelity Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language