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ze·in | \ ˈzē-ən 
\
\Definition of zein
: a protein from corn that lacks lysine and tryptophan and is used especially in making textile fibers, plastics, printing inks, coatings, and adhesives and sizes
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zein
nounze·in | \ ˈzē-ən \
\Medical Definition of zein
: a protein from Indian corn that lacks lysine and tryptophan
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The first known use of zein was in 1820
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