endometriosis

American  

[en-doh-mee-tree-oh-sis] / ˌɛn doʊˌmi triˈoʊ sɪs /

noun

Pathology.

1. the presence of tissue similar to the uterine lining outside of the uterus, especially in other pelvic organs such as the ovaries: characterized by cyst formation, adhesions, and pain.

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endometriosis British  

/ ˌɛndəʊˌmiːtrɪˈəʊsɪs /

noun

1. pathol the presence of endometrium in areas other than the lining of the uterus, as on the ovaries, resulting in premenstrual pain

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endometriosis Scientific  

/ ĕn′dō-mē′trē-ō′sĭs /

1. A gynecologic disorder characterized by the abnormal presence of functional endometrial tissue outside the uterus, often resulting in pelvic pain and dysmenorrhea.

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Etymology

Origin of endometriosis

First recorded in 1920–25; from New Latin; endometri(um) ( def. ) + -osis ( def. )

Example Sentences

See Examples For:

endometriosis

From the age of 13, when she started her periods, she was plagued by excruciating pain but she was only finally diagnosed with endometriosis when she was 25.

From BBC ● Jul. 19, 2026

Because her endometriosis had been left untreated for so long, it had formed into frozen pelvis disease where "everything was stuck together".

From BBC ● Jul. 19, 2026

Monica Thomas, 34, from Ipswich had to wait years before she was diagnosed with endometriosis.

From BBC ● Jul. 19, 2026

Tolo is hoping to shed more light on endometriosis and other conditions that affect women’s periods.

From The Wall Street Journal ● Jul. 13, 2026

He’d pioneered the use of estrogen for treating symptoms of menopause and made important early discoveries about endometriosis.

From "The Immortal Life of Henrietta Lacks" by Rebecca Skloot