English dictionary
amnion
/'/&/mn/i//@/n/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
-
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
Source: WordNet 3.0
-
A thin membrane surrounding the embryos of mammals, birds, and reptiles.
Source: webster1913