en·​do·​me·​tri·​osis | \ˌen-dō-ˌmē-trē-ˈō-səs \

Definition of endometriosis 

: the presence and growth of functioning endometrial tissue in places other than the uterus that often results in severe pain and infertility

Examples of endometriosis in a Sentence

Recent Examples on the Web

After being diagnosed with an additional mental health condition and undergoing stressful medical ordeals to treat her endometriosis (including a total hysterectomy earlier this year), Dunham’s anxiety only grew. Carolyn L. Todd, SELF, "Lena Dunham Says She's 6 Months Sober After Years of 'Misusing' Her Anti-Anxiety Medication," 30 Oct. 2018 Halsey finds the support from her peers, including those who also suffer from endometriosis, to be an immediate bonding experience. Michaela Bechler, Vogue, "Halsey Kept Things Real at the 9th Annual Blossom Ball," 20 Mar. 2018 Read more about vaginal health: Now, hear four women talk about their struggles with endometriosis: Don't forget to follow Allure on Instagram and Twitter. Carolyn Todd, Allure, "This Is Why You Keep Getting UTIs After Sex," 13 Aug. 2018 Lena Dunham shares topless hospital selfie to celebrate progress in her battle with endometriosis. Fox News, "FOX NEWS FIRST: Trump to meet with Putin in highly anticipated summit; France wins 2018 World Cup," 16 July 2018 For moms, the advantages of nursing include reduced risks of breast and ovarian cancer, obesity, heart disease, and possibly, endometriosis. Marie Mccullough, Philly.com, "Why breastfeeding is best, despite that Trump administration uproar," 9 July 2018 In 2016, complications from endometriosis kept Dunham from participating in the press tour for the fifth season of her HBO show Girls, including an emergency hospital visit for a ruptured ovarian cyst. Maeve Mcdermott, USA TODAY, "Lena Dunham undergoes total hysterectomy following endometriosis battle," 14 Feb. 2018 ESPN Host Molly Qerim had never heard of endometriosis — until she was diagnosed with the painful uterine disorder seven years ago. Julie Mazziotta, PEOPLE.com, "ESPN Host Molly Qerim Reveals Endometriosis Struggle: 'It Put My Body into Menopause'," 16 Apr. 2018 Like nearly 10 percent of women, Beim has lived with endometriosis her whole adult life. Megan Molteni, WIRED, "This Company Wants Your Fertility Data," 13 July 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'endometriosis.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

See More

First Known Use of endometriosis

1925, in the meaning defined above

History and Etymology for endometriosis

New Latin

Keep scrolling for more

Learn More about endometriosis

Share endometriosis

Statistics for endometriosis

Last Updated

5 Dec 2018

Look-up Popularity

Time Traveler for endometriosis

The first known use of endometriosis was in 1925

See more words from the same year

Keep scrolling for more

More Definitions for endometriosis


en·​do·​me·​tri·​osis | \ˌen-dō-ˌmē-trē-ˈō-səs \
plural endometrioses\-​ˌsēz \

Medical Definition of endometriosis 

: the presence and growth of functioning endometrial tissue in places other than the uterus that often results in severe pain and infertility — see adenomyosis

Other Words from endometriosis

endometriotic \-​trē-​ˈät-​ik \ adjective

More from Merriam-Webster on endometriosis

Britannica.com: Encyclopedia article about endometriosis

Comments on endometriosis

What made you want to look up endometriosis? Please tell us where you read or heard it (including the quote, if possible).


a nest or breeding place

Get Word of the Day daily email!

Test Your Vocabulary

Late Autumn 2018 Words of the Day Quiz

  • frosted-autumn-leaves
  • Which is a synonym of yahoo?
Name That Thing

Test your visual vocabulary with our 10-question challenge!


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!