DROSS

dros (sigh): The refuse of smelting of precious metal (Proverbs 25:4; 26:23); used figuratively of what is base or worthless (Isaiah 1:22,25; Ezekiel 22:18-19; Psalms 119:119).

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.