allantoic sac

allantoic sac definition - medical

al·lan·to·ic sac (ălˌən-tōˈĭk, -ăn-)

noun
The dilated distal portion of the allantois.

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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