uter·​us | \ ˈyü-tə-rəs How to pronounce uterus (audio) , ˈyü-trəs \
plural uteri\ ˈyü-​tə-​ˌrī How to pronounce uterus (audio) \ or uteruses

Definition of uterus

1 : a muscular organ of the female mammal for containing and usually for nourishing the young during development prior to birth

called also womb

2 : a structure in some lower animals analogous to the uterus in which eggs or young develop

Examples of uterus in a Sentence

Recent Examples on the Web My question concerns the benefits and risks of taking oral estrogen following removal of ovaries and uterus due to my concerns about ovarian cancer. Dr. Keith Roach, oregonlive, 26 Aug. 2021 In-vitro fertilization is an extended procedure during which doctors retrieve your eggs, fertilize them in the lab, and implant the resulting embryo(s) in your uterus. Taylyn Washington-harmon, Health.com, 18 May 2021 Problems with the uterus or cervix and chromosome abnormalities often play a role. Kate Mabus, USA TODAY, 5 Aug. 2021 Avoid performing exercises flat on your back: Exercising flat on your back (also known as the supine position) puts pressure from your growing uterus on a large vein that returns blood to the heart. Stefani Sassos, Ms, Rdn, Cso, Cdn, Nasm-cpt, Good Housekeeping, 22 July 2021 Fibroids could cause the uterus to push against the back or butt. Suzannah Weis, SELF, 21 July 2021 Babies are born covered in vernix, a thick, cheese-like material that protects the skin when a fetus is growing inside a pregnant person's uterus (cute!). Danielle Campoamor, refinery29.com, 19 July 2021 The singer has struggled with endometriosis, a condition that causes the tissue that normally lines the uterus to grow outside it. Emily Tannenbaum, Glamour, 19 July 2021 At the clinic the patient takes mifepristone, which blocks the progesterone hormone, causes the uterus lining to thin and prevents the fetus from staying implanted and growing. Laura Hancock, cleveland, 16 July 2021

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

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First Known Use of uterus

14th century, in the meaning defined at sense 1

History and Etymology for uterus

Middle English, from Latin, belly, womb; probably akin to Greek hoderos belly, Sanskrit udara

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The first known use of uterus was in the 14th century

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Last Updated

11 Sep 2021

Cite this Entry

“Uterus.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/uterus. Accessed 22 Sep. 2021.

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More Definitions for uterus



English Language Learners Definition of uterus

: the organ in women and some female animals in which babies develop before birth


uter·​us | \ ˈyü-tə-rəs How to pronounce uterus (audio) \
plural uteruses or uteri\ ˈyü-​tə-​ˌrī \

Kids Definition of uterus

: the organ of a female mammal in which the young develop before birth


uter·​us | \ ˈyüt-ə-rəs How to pronounce uterus (audio) \
plural uteri\ -​ˌrī How to pronounce uterus (audio) \ also uteruses

Medical Definition of uterus

: an organ in female mammals for containing and usually for nourishing the young during development prior to birth that consists of a greatly modified and enlarged section of an oviduct (as in rodents and marsupials) or of the two oviducts united (as in the higher primates including humans), that has thick walls consisting of an outer serous layer, a very thick middle layer of smooth muscle, and an inner mucous layer containing numerous glands, and that during pregnancy undergoes great increase in size and change in the condition of its walls

called also womb

— see cervix sense 2a, corpus uteri, endometrium, fundus sense c, myometrium, perimetrium

More from Merriam-Webster on uterus

Nglish: Translation of uterus for Spanish Speakers

Britannica English: Translation of uterus for Arabic Speakers

Britannica.com: Encyclopedia article about uterus


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