/ Dictionary / Index A advocatus diaboli*: Meaning and Definition of Find definitions for: ad•vo•ca•tus di•a•bo•li Pronunciation: (äd"vô-kä'ts dē-ä'bô-lē"), [key] — Medieval Latin. Medieval Latin. See(def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. advocatory advowson Related Content Daily Word Quiz: lunar Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language