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

Jessica Lewis, 25, was diagnosed with endometriosis two years ago.

From BBC ● Jul. 20, 2026

While Etchells wishes she was listened to on that first GP visit aged 13, she now feels "lucky" to be under a dedicated endometriosis team who do listen.

From BBC ● Jul. 18, 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

While laparoscopic surgery remains the only way to definitively prove the existence of endometriosis, medical consensus is now moving toward treating symptoms based on a clinical diagnosis rather than a surgical one.

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