rennet
/ˈrenɪt/noun
mass noun
1- curdled milk from the stomach of an unweaned calf, containing rennin and used in curdling milk for cheese（小牛）凝乳（取自未断奶牛犊胃中, 含凝乳酶, 用于制干酪）, （牛胃）凝乳。
1.1
- any preparation containing rennin粗制凝乳酶。
词源
late 15th cent.: probably related to RUN.