whey Meaning, Definition & Usage

  1. noun the serum or watery part of milk that is separated from the curd in making cheese
    milk whey.
  2. noun watery part of milk produced when raw milk sours and coagulates
    • Little Miss Muffet sat on a tuffet eating some curds and whey

WordNet

Whey noun
Etymology
AS. hwæg; cf. D. wei, hui, Fries. weye, LG. wey, waje.
Definitions
  1. The serum, or watery part, of milk, separated from the more thick or coagulable part, esp. in the process of making cheese. In this process, the thick part is called curd, and the thin part whey.

Webster 1913