Pronunciation : Slag
Part of Speech : n.
Etymology : [Sw. slagg, or LG. slacke, whence G. schlacke; originally, perhaps, the splinters struck off from the metal by hammering. See Slay, v. t.]
Definition : 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.
Source : Webster's Unabridged Dictionary, 1913