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
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Continuous use may be especially helpful for people who have painful periods, heavy periods, endometriosis, migraines, iron-deficiency anemia, physical or intellectual disabilities, and transgender individuals.
—Kameryn Griesser, CNN Money, 21 May 2025
These tests could help providers diagnose endometriosis sooner and more accurately, reducing the need for surgery.
—Laura Young, Verywell Health, 24 Apr. 2025
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
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Kameryn Griesser, CNN Money, 21 May 2025
These tests could help providers diagnose endometriosis sooner and more accurately, reducing the need for surgery.
—Laura Young, Verywell Health, 24 Apr. 2025
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
See All Example Sentences for endometriosis
Cite this Entry
“Endometriosis.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endometriosis. Accessed 8 Jul. 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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