Vitelline

{yit-el’-in, vit’-el-in) [vitellus, yolk]. Pertaining to the vitellus or yolk. V. Artery, an artery pa ing from the yolksac to the primitive aorta of the embryo. V. Duct, the omphalomesenteric duct. V. Membrane, the true membrane of the ovum, lying inside of the zona pellucid a. V. Veins, veins returning the blood from the yolk-sac to the primitive heart of the embryo. 658