/ Dictionary / Index D diadic: Meaning and Definition of Find definitions for: di•ad•ic Pronunciation: (dī-ad'ik), [key] — adj., n. dyadic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. diadem diadochokinesia Related Content Daily Word Quiz: supine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language