Definitions of chorion [ˈkɔr iˌɒn, ˈkoʊr-]

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Definition of 'chorion'

Random House Webster's College Dictionary

1. (n.) chorion
the outermost of the membranes enclosing the embryo in reptiles, birds, and mammals, developing into part of the eggshell or part of the placenta.

2. chorion
a membrane enclosing the shell of an insect egg.

Etymology: (1535–45; < Gk chórion afterbirth)

Definition of 'chorion'

Princeton's WordNet

1. (noun) chorion
the outermost membranous sac enclosing the embryo in higher vertebrates (reptiles, birds and mammals)

Definition of 'chorion'

Webster Dictionary

1. (noun) chorion
the outer membrane which invests the fetus in the womb; also, the similar membrane investing many ova at certain stages of development

2. (noun) chorion
the true skin, or cutis

3. (noun) chorion
the outer membrane of seeds of plants

Definition of 'chorion'

U.S. National Library of Medicine

1. chorion
The outermost extra-embryonic membrane surrounding the developing embryo. In REPTILES and BIRDS, it adheres to the shell and allows exchange of gases between the egg and its environment. In MAMMALS, the chorion evolves into the fetal contribution of the PLACENTA.

'chorion' - Nearby Entries
chorioallantoic membrane chorioallantois choriomeningitis chorion chorionic chorionic villus chorionic villus biopsy

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