Plural of chymosin; multiple forms or molecules of the milk-curdling digestive enzyme.
From 'chymosin' + regular English plural '-s'. Chymosin itself derives from Greek 'chymos' (digestive juice) + '-in' (enzyme).
Different animals produce slightly different chymosins—cow chymosin curves differently than goat chymosin, which is why traditionally different cheeses require different animals' milk.
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