- the endometrium of a pregnant uterus that in many of the higher mammals is cast off at parturition.
Origin of decidua
1775–85; < New Latin, noun use of feminine of Latin dēciduus falling; see deciduous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for decidua
Folds of this nature, which are specially developed in Man and Apes, are known as a decidua reflexa.
The decidua reflexa of the Rat is reduced to extreme tenuity, or even vanishes before the close of gestation.
The decidua reflexa and serotina together envelop the chorion, the processes of which fit into crypts in them.
The chorion frondosum, together with the decidua serotina, gives rise to the placenta.
This ovum, though probably not more than thirteen days old, was completely enclosed by a decidua reflexa.
- the specialized mucous membrane that lines the uterus of some mammals during pregnancy: is shed, with the placenta, at parturition
C18: from New Latin, from Latin dēciduus falling down; see deciduous
- A mucous membrane lining the uterus, modified during pregnancy and shed at parturition or during menstruation.deciduous membrane
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.