chorion

noun
cho·​ri·​on | \ˈkȯr-ē-ˌän \

Definition of chorion 

: the highly vascular outer embryonic membrane of reptiles, birds, and mammals that in placental mammals is associated with the allantois in the formation of the placenta

First Known Use of chorion

1545, in the meaning defined above

History and Etymology for chorion

New Latin, from Greek, afterbirth

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Time Traveler for chorion

The first known use of chorion was in 1545

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More Definitions for chorion

chorion

noun
cho·​ri·​on | \ˈkōr-ē-ˌän, ˈkȯr- \

Medical Definition of chorion 

: the highly vascular outer embryonic membrane that is associated with the allantois in the formation of the placenta

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More from Merriam-Webster on chorion

Rhyming Dictionary: Words that rhyme with chorion

Britannica English: Translation of chorion for Arabic Speakers

Britannica.com: Encyclopedia article about chorion

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