rennet

ren·net

noun \ˈren-ət\

Definition of RENNET

1

a : the contents of the stomach of an unweaned animal and especially a calf b : the lining membrane of a stomach or one of its compartments (as the fourth of a ruminant) used for curdling milk; also : a preparation of the stomach of animals used for this purpose

2

a : rennin b : a substitute for rennin