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The Collaborative International Dictionary
Vitellogene

Vitellogene \Vi*tel"lo*gene\, n. [See Vitellus, and -gen.] (Zo["o]l.) A gland secreting the yolk of the eggs in trematodes, turbellarians, and some other helminths.

Wiktionary
vitellogene

n. (context zoology English) A gland secreting the yolk of the eggs in trematodes, turbellarians, and some other helminths.