yolk sac

Medical Dictionary

yolk sac n.
A membranous sac attached to an embryo, enclosing food yolk. Also called umbilical vesicle.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
Explore Dictionary.com
Previous Definition: yolk membrane
Next Definition: yolk stalk
Words Near: yolk sac
More from Thesaurus.com
Synonyms and Antonyms for yolk sac
More from Reference.com
Search for articles containing yolk sac
More from Dictionary.com Translator
Dictionary.com Word FAQs

Dictionary.com presents 366 FAQs, incorporating some of the frequently asked questions from the past with newer queries.

Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature