Decidua
Pronunciation : De*cid"u*a
Part of Speech : n.
Etymology : [NL., fr. L. deciduus. See Deciduous.] (Anat.)
Definition : Defn: The inner layer of the wall of the uterus, which envelops the embryo, forms a part of the placenta, and is discharged with it.
Source : Webster's Unabridged Dictionary, 1913