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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As a result, there is a long list of serious and pervasive conditions without good solutions, including autoimmune diseases, heavy menstrual bleeding, and endometriosis.
—Anita Zaidi, Fortune, 4 Aug. 2025
One core research focus is endometriosis, a chronic condition that affects one in 10 women during their reproductive years.
—Alexis Kayser, MSNBC Newsweek, 25 July 2025
Theories include: Metaplasia: The leading theory among endometriosis surgeons is that abnormalities during fetal development lead to specific cells turning into endometriosis.
—Sarah Bence, Verywell Health, 18 June 2025
In 2023, the mom of one revealed an endometriosis diagnosis that also required surgery.
—Tracy Wright, FOXNews.com, 26 May 2025
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Anita Zaidi, Fortune, 4 Aug. 2025
One core research focus is endometriosis, a chronic condition that affects one in 10 women during their reproductive years.
—Alexis Kayser, MSNBC Newsweek, 25 July 2025
Theories include: Metaplasia: The leading theory among endometriosis surgeons is that abnormalities during fetal development lead to specific cells turning into endometriosis.
—Sarah Bence, Verywell Health, 18 June 2025
In 2023, the mom of one revealed an endometriosis diagnosis that also required surgery.
—Tracy Wright, FOXNews.com, 26 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 21 Aug. 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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