n. the mucous membrane that lines the uterus in mammals and in which fertilized eggs are implanted
the GNU version of the Collaborative International Dictionary of English
n. The membrane lining the inner surface of the uterus, or womb.
The Century Dictionary and Cyclopedia
n. The lining membrane of the uterus.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. (pregnancy) the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition
Word Usage
"Ninety-four percent of uterine cancers begin in the lining of the uterus, also called the endometrium."