milkstone

noun

1

a

: a stone (as galactite) believed to increase milk secretion

b

: any of various white stones (as a flint pebble)

2

: a hard body that forms in the bovine udder

3

: a hard deposit of milk residues that accumulates on imperfectly cleansed dairy utensils and serves as a substrate for bacteria and contributes off-flavors to milk

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