rennin
noun
ren·nin
| \ ˈre-nən
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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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More Definitions for rennin
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