chorion
[kawr-ee-on, kohr-]
|
noun
Embryology. the outermost of the extraembryonic membranes of land vertebrates, contributing to the formation of the placenta in the placental mammals.
Zoology. the membrane around the eggs of certain insects, secreted by cells of the ovary.
Origin of chorion
1535–45; < New Latin < Greek chórion membrane enclosing the fetus
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for chorion
Historical Examples of chorion
The chorion is often ornamented with various processes, etc.
The Works of Francis Maitland Balfour, Volume II (of 4)Francis Maitland Balfour
The chorion is an outward skin which compasseth the child in the womb.
In the Cheiroptera (Vespertilio and Pteropus), the yolk-sack is large, and coalesces with part of the chorion.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
The allantoic cavity persists (Owen), but the allantois only covers the placental area of the chorion.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
This form of placenta occupies a broad zone of the chorion, leaving the two poles free.
The Works of Francis Maitland Balfour, Volume III (of 4)Francis Maitland Balfour
chorion
noun
Word Origin for chorion
C16: from Greek khorion afterbirth
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
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Online Etymology Dictionary, © 2010 Douglas Harper
chorion
[kôr′ē-ŏn′]
n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
chorion
[kôr′ē-ŏn′]
The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.