NCIt definition : The mucous membrane comprising the inner layer of the uterine wall; it consists of
a simple columnar epithelium and a lamina propria that contains simple tubular uterine
glands. The structure, thickness, and state of the endometrium undergo marked change
with the menstrual cycle.;
Alternative definition : CDISC: The mucous membrane comprising the inner layer of the uterine wall.; NCI-GLOSS: The layer of tissue that lines the uterus.;