Category:Slag

Slag, n. Etym: [sw. slagg, or lg. slacke, whence g. schlacke; Originally, perhaps, the splinters struck off from the metal by Hammering. See slay, v. t.]

1. The dross, or recrement, of a metal; also, vitrified cinders.

2. The scoria of a volcano. Slag furnace, or slag hearth (metal.), a Furnace, or hearth, for extracting lead from slags or poor ore. -- slag wool, mineral wool. See under mineral.