endometrium

noun

en·​do·​me·​tri·​um ˌen-dō-ˈmē-trē-əm 

plural endometria ˌen-dō-ˈmē-trē-əm 

: the mucous membrane lining the uterus

endometrial

ˌen-dō-ˈmē-trē-əl 

adjective

Examples of endometrium in a Sentence

Recent Examples on the Web

During menses, low estrogen and progesterone levels help shed the uterine lining (endometrium). —Carley Millhone, Health, 13 Dec. 2024

Without hormonal regulation, your endometrium may shed in an erratic, unpatterned way. —Corey Whelan, Verywell Health, 4 Nov. 2024

Endometriosis occurs when tissue similar to the uterine lining (endometrium) develops outside the uterus. —Cory Martin, Verywell Health, 30 Sep. 2024

The lining of the uterus (endometrium) and the corpus luteum will dissipate, and your body will prepare for menstruation.3 Hormonal Fluctuations and Your Menstrual Cycle Some people have very regular periods, but others don't. —Corey Whelan, Verywell Health, 18 Sep. 2024

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

Kids Definition

endometrium

noun

en·​do·​me·​tri·​um ˌen-dō-ˈmē-trē-əm 

plural endometria -trē-ə 

: the mucous membrane lining the uterus

Medical Definition

endometrium

noun

en·​do·​me·​tri·​um -ˈmē-trē-əm 

plural endometria -trē-ə 

: the mucous membrane lining the uterus that is composed of three layers see stratum basale, stratum compactum, stratum spongiosum