allantochorion
Medical Dictionary

allantochorion al·lan·to·cho·ri·on (ə-lān'tō-kôr'ē-ŏn')
n.
The extraembryonic membrane formed by the fusion of the allantois and the chorion.

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