endometrium

noun

en·​do·​me·​tri·​um ˌen-dō-ˈmē-trē-əm How to pronounce endometrium (audio)
plural endometria ˌen-dō-ˈmē-trē-əm How to pronounce endometrium (audio)
: the mucous membrane lining the uterus
endometrial
ˌen-dō-ˈmē-trē-əl How to pronounce endometrium (audio)
adjective

Examples of endometrium in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Uterine polyps Polyps are soft, fleshy growths usually found on the inside lining of the uterus (called the endometrium) and on or around the cervix. — Ashley Abramson, SELF, 7 May 2025 Obesity can affect hormone levels, which may cause cells in the endometrium to change and grow uncontrollably. — Carrie Madormo, Health, 13 July 2025 This may happen due to hormonal issues, such as low progesterone, or problems with the way your endometrium (uterine lining) responds to progesterone. — Laura Dorwart, Verywell Health, 8 July 2025 The endometrium is an inner layer of the uterus, and endometrial cancer therefore primarily affects women. — Abigail Folberg, The Conversation, 27 Aug. 2025 See All Example Sentences for endometrium

Word History

Etymology

New Latin, from end- + Greek mētra uterus, from mētr-, mētēr mother — more at mother

First Known Use

circa 1882, in the meaning defined above

Time Traveler
The first known use of endometrium was circa 1882

Rhymes for endometrium

See All Rhymes for endometrium

Browse Nearby Words

endometritis
endometrium
endomitosis
See all Nearby Words

Cite this Entry

“Endometrium.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endometrium. Accessed 7 Jul. 2026.

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Kids Definition

endometrium

noun
en·​do·​me·​tri·​um ˌen-dō-ˈmē-trē-əm How to pronounce endometrium (audio)
plural endometria -trē-ə How to pronounce endometrium (audio)
: the mucous membrane lining the uterus

Medical Definition

endometrium

noun
en·​do·​me·​tri·​um -ˈmē-trē-əm How to pronounce endometrium (audio)
plural endometria -trē-ə How to pronounce endometrium (audio)
: the mucous membrane lining the uterus that is composed of three layers see stratum basale, stratum compactum, stratum spongiosum

More from Merriam-Webster on endometrium

Britannica.com: Encyclopedia article about endometrium

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