'Chorion' definitions:
Definition of 'chorion'
(from WordNet)
noun
The outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
Definition of 'Chorion'
From: GCIDE
- Chorion \Cho"ri*on\, n. [NL., fr. Gr. ?.]
- 1. (Anat.) (a) The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development. (b) The true skin, or cutis. [1913 Webster]
- 2. (Bot.) The outer membrane of seeds of plants. [1913 Webster]