/ Dictionary / Index E endometrium: Meaning and Definition of Find definitions for: en•do•me•tri•um Pronunciation: (en"dō-mē'trē-um), [key] — pl. -tri•a the mucous membrane lining the uterus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: endometrium (Thesaurus) endometritis endomitosis Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language