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embryonic membrane

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extraembryonic membrane

–noun Embryology.
any of the tissues, derived from the fertilized egg, that enclose or otherwise contribute to the support of the developing embryo, as the yolk sac, allantois, amnion, and chorion.
Also called embryonic membrane.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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embryonic membrane  
n.  Any of the membranous structures closely associated with or surrounding a developing vertebrate embryo, including the amnion, chorion, allantois, and yolk sac.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Medical Dictionary

Main Entry: embryonic membrane
Function: noun
: a structure (as the amnion) that derives from the fertilized ovum but does not form a part of the embryo
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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Medical Dictionary

embryonic membrane n.
See fetal membrane.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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