buttermilk

noun

Etymology: Inherited from Middle English butter-melke, equivalent to butter + milk. Cognate with Dutch botermelk (“buttermilk”), German Buttermilch (“buttermilk”), Low German Bottermelk (“buttermilk”), Luxembourgish Bottermëllech (“buttermilk”), Plautdietsch Bottamalkj, Bottamaltj, Bottermalkj, Bottermaltj (“buttermilk”), and Yiddish פּוטערמילך (putermilkh), פּוטער־מילעך (puter-milekh, “buttermilk”).

1. The liquid left over after producing butter from full cream milk by the churning process, also called traditional buttermilk.

   “An anti-aphrodisiac, suggested in Hindu erotological literature as a way for women to negate amatory challenges, is to bathe in the buttermilk of a she-buffalo.”

2. Cultured buttermilk, a fermented dairy product produced from cow's milk, with a characteristically sour taste.
3. A light yellow color, like that of buttermilk.