DROSS. The refuse in impure metals that is generally separated by melting, when the dross rises to the top and may be skimmed off. It is used figuratively of what is worthless (
כֶּ֣סֶף ֭סִיגִים “silver of dross” (
W. F. Albright, BASOR 98 (1945), 24, 25.
International Standard Bible Encyclopedia (1915)
The refuse of smelting of precious metal (