endometriosis
noun
en·do·me·tri·osis
ˌen-dō-ˌmē-trē-ˈō-səs 
: the presence and growth of tissue similar to endometrium in places other than the uterus and especially in the pelvis and abdomen that often results in severe pain and infertility
Endometriosis is not malignant, but it mimics cancer in the way it spreads and attaches itself to other organs—most commonly the ovary, bladder, and bowel.—
Consumer Reports
Consumer ReportsEndometriosis is one of the leading causes of female infertility and causes great pain and life disruption.—Paul G. Donohue
Paul G. DonohueExamples of endometriosis in a Sentence
Recent Examples on the Web
Even so, Knight’s not yet sure whether the endometriosis is to blame for her hospitalization.
—Jami Ganz, New York Daily News, 21 May 2025
One saving grace in both validating her pain and confirming Roderick Joel’s endometriosis diagnosis was Dr. Tamer Seckin, a renowned endometriosis specialist, the research center’s namesake and the Endometriosis Foundation’s co-founder.
—Mara Santilli, Flow Space, 20 May 2025
In the middle of training for two marathons and an ultramarathon in 2017, medical professionals diagnosed culinary arts professional turned long-distance runner, and body politics advocate Latoya Snell, with stage four rectovaginal endometriosis.
—Ashia Aubourg, Outside Online, 4 May 2025
Typically associated with endometriosis, endometriomas form when the lining of the uterus (the endometrium) grows on the ovary’s surface.
—Caroline C. Boyle, USA Today, 4 June 2025
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Jami Ganz, New York Daily News, 21 May 2025
One saving grace in both validating her pain and confirming Roderick Joel’s endometriosis diagnosis was Dr. Tamer Seckin, a renowned endometriosis specialist, the research center’s namesake and the Endometriosis Foundation’s co-founder.
—Mara Santilli, Flow Space, 20 May 2025
In the middle of training for two marathons and an ultramarathon in 2017, medical professionals diagnosed culinary arts professional turned long-distance runner, and body politics advocate Latoya Snell, with stage four rectovaginal endometriosis.
—Ashia Aubourg, Outside Online, 4 May 2025
Typically associated with endometriosis, endometriomas form when the lining of the uterus (the endometrium) grows on the ovary’s surface.
—Caroline C. Boyle, USA Today, 4 June 2025
See All Example Sentences for endometriosis
Cite this Entry
“Endometriosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endometriosis. Accessed 30 Jun. 2025.
Copy CitationMedical Definition
endometriosis
noun
en·do·me·tri·osis
ˌen-dō-ˌmē-trē-ˈō-səs
plural endometrioses
-ˌsēz
: the presence and growth of tissue similar to endometrium in places other than the uterus and especially in the pelvis and abdomen and that often results in severe pain and infertility
The primary symptoms of endometriosis are pelvic pain, dysmenorrhea, dyspareunia, backache, dyschezia, dysuria, and infertility.—G. David Adamson, The Journal of the American Medical Association
G. David Adamson, The Journal of the American Medical AssociationAbout 40 percent of infertile women suffer from endometriosis.—Gigi Martino, Science News
see adenomyosis
Gigi Martino, Science NewsLove words? Need even more definitions?
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