Vitelline body see yolk nucleus

vitelline duct (PLATY: Turbellaria) One of paired ducts connecting the vitelline glands to the common vitelline duct.

vitelline membrane A membrane enclosing eggs of invertebrates located within an egg shell.

vitellogenesis n. [L. vitellus, yolk; Gr. genesis, beginning] The production of yolk.

vitellophages, vitellophags n.pl. [L. vitellus, yolk; Gr.

phagein, to eat] Cells involved with the breakdown of the yolk at all stages of development. vitellophagic a.

vitellus n. [L. vitellus, yolk] The yolk of an egg.

vitreous a. [L. vitrum, glass] Glassy; transparent.

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