/ Dictionary / Index M mediad: Meaning and Definition of Find definitions for: me•di•ad Pronunciation: (mē'dē-ad"), [key] — adv. Anat., Zool. toward the middle line or plane. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mediacy mediaeval Related Content Daily Word Quiz: dissonant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language