ENDOMETRIUM Meaning of ENDOMETRIUM in English [ ˌɛndə(ʊ)'mi:trɪəm ]■ noun Anatomy the mucous membrane lining the womb.Derivativesendometrial adjective OriginC19: mod. L., from endo- + Gk mētra 'womb'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004