chorion

chorion definition - medical

cho·ri·on (kôrˈē-ŏnˌ)

noun
The outer membrane enclosing the embryo in reptiles, birds, and mammals. In placental mammals it contributes to the development of the placenta.

Related Forms:

  • choˌri·onˈic (-ŏnˈĭk) adjective

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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