from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A mucous membrane lining the uterus, modified during pregnancy and shed at parturition or during menstruation.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A mucous membrane that lines the uterus and is shed during menstruation and modified during pregnancy
from the GNU version of the Collaborative International Dictionary of English
- n. The inner layer of the wall of the uterus, which envelops the embryo, forms a part of the placenta, and is discharged with it.
from The Century Dictionary and Cyclopedia
- n. In physiology, a membrane arising from alteration of the upper layer of the mucous membrane of the uterus, after the reception into the latter of the impregnated ovum, the name being given to it because it is discharged at parturition.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. the epithelial tissue of the endometrium
New Latin (membrāna) dēcidua, (membrane) that falls off, from Latin dēciduus, falling off; see deciduous.(American Heritage® Dictionary of the English Language, Fourth Edition)