/ Dictionary / Index M medius: Meaning and Definition of Find definitions for: me•di•us Pronunciation: (mē'dē-us), [key] — pl. -di•i the middle finger. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. medium strip medivac 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