Found 2 items, similar to chorion.
English → English (WordNet) Definition: chorion chorion n : outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)
English → English (gcide) Definition: Chorion 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] ||