English dictionary
chorion
/'k/oU/r/i/,/A/n/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
-
the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
Source: WordNet 3.0
-
The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development.
Source: webster1913