/ Dictionary / Index D diphonia: Meaning and Definition of Find definitions for: di•pho•ni•a Pronunciation: (dī-fō'nē-u), [key] — n. Pathol. diplophonia. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diphenyl ketone diphosgene Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language