Main Entry:

vi·tel·lo·gen·in

Pronunciation:

\vī-ˌte-lō-ˈje-nən\

Function:

noun

Etymology:

probably from vitellogenesis + ¹-in

Date:

1971

: a precursor protein of egg yolk normally in the blood or hemolymph only of females that is used as a biomarker in vertebrates of exposure to environmental estrogens which stimulate elevated levels in males as well as females