Dross

Dross - (Easton's Bible Dictionary)

The impurities of silver separated from the one in the process of melting (Prov. 25:4; 26:23; Ps. 119:119). It is also used to denote the base metal itself, probably before it is smelted, in Isa. 1:22, 25.

Dross - (Webster's 1828 Dictionary)

DROSS, n. [G.]

1. The recrement or despumation of metals; the scum or extraneous matter of metals, thrown off in the process of melting.

2. Rust; crust of metals; an incrustation formed on metals by oxydation.

3. Waste matter; refuse; any worthless matter separated from the better part; impure matter.

The worlds glory is but dross unclean.