Found in the following dictionaries
OTCWL2014 (NASPA Word List 2014)
"Vitellogenin" Definition
noun
An egg-yolk precursor protein expressed in the females of nearly all oviparous species.
Source: Wiktionary
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.
Source: Merriam-Webster
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