[ noun ] the epithelial tissue of the endometrium <noun.body>
Decidua \De*cid"u*a\ (?; 135), n. [NL., fr. L. deciduus. See {Deciduous}.] (Anat.) The inner layer of the wall of the uterus, which envelops the embryo, forms a part of the placenta, and is discharged with it. ※ ||