uterus

noun

uter·​us ˈyü-tə-rəs 

ˈyü-trəs

plural uteri ˈyü-tə-ˌrī  or uteruses

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

The weight of the uterus can press on the spine and back muscles. —Tom Rogers, Newsweek, 22 Feb. 2025

The procedure involves retrieving her eggs and combining them in a lab dish with a man’s sperm to create a fertilized embryo, which is then transferred into the woman’s uterus in an attempt to create a pregnancy. —Darlene Superville and Michelle L. Price, Los Angeles Times, 19 Feb. 2025

Munn froze her eggs for the third time at 42 years old following her breast cancer diagnosis and underwent an oophorectomy and hysterectomy, which removed her uterus, fallopian tubes and ovaries, during cancer treatment. —Kimi Robinson, USA TODAY, 4 Feb. 2025

In the United States, more than 11% of people with a uterus who are ages 15-44 have the condition. —Rena Goldman, Health, 31 Jan. 2025

Word History

Etymology

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

First Known Use

14th century, in the meaning defined at sense 1

Kids Definition

uterus

noun

uter·​us ˈyüt-ə-rəs 

plural uteruses or uteri -ˌrī 

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

called also womb

Medical Definition

uterus

noun

uter·​us ˈyüt-ə-rəs 

plural uteri -ˌrī  also uteruses

: 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