| slag | 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. Source: Websters Dictionary (01 Mar 1998) |
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| slag | the scum formed by oxidation at the surface of molten metals |
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| slag | pile of waste matter from coal mining etc |
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