First Known Use: 1897
Dictionary
rennin
noun ren·nin \ˈre-nən\
Definition of RENNIN
: an enzyme that coagulates milk and is used in making cheese and junkets; especially : one from the mucous membrane of the stomach of a calf
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Origin of RENNIN
rennet + 1-in
Medical Dictionary
rennin
noun ren·nin \ˈren-ən\
Medical Definition of RENNIN
: a crystallizable enzyme that coagulates milk, that occurs especially with pepsin in the gastric juice of young animals and is obtained as a yellowish powder, grains, or scales usually by extraction of the mucous membrane of the fourth stomach of calves, and that is used chiefly in making cheese and casein for plastics—called also chymosin
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