noun.
The watery part of milk that separates from the curds, as in the process of making cheese.
The Century Dictionary and Cyclopedia
noun.
An obsolete form of quey.
noun.
The serum of milk: that part of milk which remains fluid after the proteids have been coagulated by rennet as in cheese-making, or by an acid as in the natural souring of milk.
the GNU version of the Collaborative International Dictionary of English
noun.
The serum, or watery part, of milk, separated from the more thick or coagulable part, esp. in the process of making cheese.
noun.
The liquid remaining after milk has been curdled and strained in the process of making cheese.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
watery part of milk produced when raw milk sours and coagulates
noun.
the serum or watery part of milk that is separated from the curd in making cheese
Word Usage
"If I forget to feed it for several weeks, it will separate and the whey is a not very attractive grey liquid but it still works once fed and I haven't killed it yet."