Breadcrumb Home > Dictionary > Index D decidua: Meaning and Definition of Find definitions for: de•cid•u•a Pronunciation: (di-sij'-u), [key] — pl. -cid•u•as, -cid•u•ae the endometrium of a pregnant uterus that in many of the higher mammals is cast off at parturition. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: decidua (Thesaurus) deciding deciduate TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: outr Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language