n., pl., -u·as, or -u·ae (-ū-ē').
A mucous membrane lining the uterus, modified during pregnancy and shed at parturition or during menstruation.
[New Latin (membrāna) dēcidua, (membrane) that falls off, from Latin dēciduus, falling off. See deciduous.]
decidual de·cid'u·al adj.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.
