decidua basalis

[ bə-sālĭs ]

n.

The area of endometrium between the implanted chorionic vesicle and the myometrium, which becomes the maternal part of the placenta.decidua serotina
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.