The scum or refuse matter which is thrown off, or falls from, metals in smelting the ore, or in the process of melting; recrement.
Rust of metals. [R.] Addison.
Waste matter; any worthless matter separated from the better part; leavings; dregs; refuse. All world's glory is but dross unclean. Spenser. At the devil's booth are all things sold, Each ounce of dross coats its ounce of gold. Lowell.
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