vitelline sac


Also found in: Thesaurus, Medical, Encyclopedia.
Related to vitelline sac: vitelline circulation, Vitelline vein, vitelline fistula
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.vitelline sac - membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functionalvitelline sac - membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
sac - a structure resembling a bag in an animal