decidua parietalis

[pə-rī′ĭ-tālĭs]
n.
  1. The mucous membrane lining the main cavity of the pregnant uterus elsewhere than at the site of attachment of the chorionic vesicle.decidua vera
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.