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Definition of Chorion
1. Noun. The outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals).
Terms within: Chorionic Villus
Category relationships: Mammal, Mammalian
Generic synonyms: Sac
Derivative terms: Chorionic
Definition of Chorion
1. n. The outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development.
Definition of Chorion
1. Noun. The protective and nutritive membrane that attaches higher vertebrate fetuses to the uterus. ¹
2. Noun. The outer case of an insect egg. ¹
3. Noun. The outer membrane of seeds of plants. ¹
¹ Source: wiktionary.com
Definition of Chorion
1. an embryonic membrane [n -S]
Medical Definition of Chorion
1. 1. Protective membrane around the eggs of insects and fishes. 2. Extraembryonic membrane surrounding the embryo of amniote vertebrates. The outer epithelial layer of the chorion is derived from the tropoblast. This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)
Lexicographical Neighbors of Chorion
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