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

2. The scoria of a volcano.

<chemistry> Slag furnace, or Slag hearth, a furnace, or hearth, for extracting lead from slags or poor ore. Slag wool, mineral wool. See Mineral.

Origin: Sw. Slagg, or LG. Slacke, whence G. Schlacke; originally, perhaps, the splinters struck off from the metal by hammering. See Slay.

(01 Mar 1998)

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