Waste formed by melting metal.

Son of man, the house of Israel is to me become DROSS: all they are brass, and tin, and iron, and lead, in the midst of the furnace; they are even the DROSS of silver. Therefore thus saith the Lord GOD; Because ye are all become DROSS, behold, therefore I will gather you into the midst of Jerusalem. ( Ezekiel 22:18-19 )

Source: A King James Dictionary. (Used with permission. Copyright © Philip P. Kapusta)

Bibliography Information

"Entry for 'Dross'". A King James Dictionary.