ENDOMETRIOSIS Meaning of ENDOMETRIOSIS in English [ ˌɛndə(ʊ)mi:trɪ'əʊsɪs ]■ noun Medicine a condition that results from the appearance of endometrial tissue outside the womb, causing pelvic pain. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004