buttermilk
Pronunciation:
/ˈbʌtəˌmɪlk//ˈbʌtɚˌmɪlk/noun
Definitions
The liquid left over after producing butter from full cream milk by the churning process, also called traditional buttermilk.
Cultured buttermilk, a fermented dairy product produced from cow's milk, with a characteristically sour taste.