/ Dictionary / Index M mydriatic: Meaning and Definition of Find definitions for: myd•ri•at•ic Pronunciation: (mid"rē-at'ik), [key] — adj. pertaining to or producing mydriasis. —n. a mydriatic drug. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mydriatic (Thesaurus) mydriasis myel- Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language