Search Result for "vitelline sac":
Wordnet 3.0

NOUN (1)

1. membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional;
[syn: yolk sac, vitelline sac, umbilical vesicle, vesicula umbilicus]



WordNet (r) 3.0 (2006):

vitelline sac
    n 1: membranous structure that functions as the circulatory
         system in mammalian embryos until the heart becomes
         functional [syn: yolk sac, vitelline sac, umbilical
         vesicle, vesicula umbilicus]