What is silt; mud deposited by water. Sullage piece (Founding), the sprue of a casting. See Sprue, n., 1 (b) called?

sullage — (Hydraul. Engin.) Silt; mud deposited by water. Sullage piece (Founding), the sprue of a casting. See Sprue, n., 1 (b). (Webster's 1913.)

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