rennet
/ˈrɛnɪt/Definitions
1. noun
A complex of enzymes derived from the stomach lining of young ruminants, especially the calf, used to convert milk into cheese.
“The cheesemaker added rennet to the warm milk to initiate curdling.”
2. verb
To add rennet to (milk) in order to convert it into cheese.
“She rennetted the milk to make a batch of feta cheese.”