Search Result for "fetal membrane":
Wordnet 3.0

NOUN (1)

1. any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus; 



WordNet (r) 3.0 (2006):

fetal membrane
    n 1: any membrane that functions for the protection or
         nourishment or respiration or excretion of a developing
         fetus