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Meaning of SLAG

Pronunciation:  slag

WordNet Dictionary
[n]  the scum formed by oxidation at the surface of molten metals

SLAG is a 4 letter word that starts with S.


 Synonyms: dross, scoria
 See Also: basic slag, scum



Webster's 1913 Dictionary
  1. \Slag\, n. (Metal.)
    A product of smelting, containing, mostly as silicates, the
    substances not sought to be produced as matte or metal, and
    having a lower specific gravity than the latter; -- called
    also, esp. in iron smelting, {cinder}. The slag of iron blast
    furnaces is essentially silicate of calcium, magnesium, and
    aluminium; that of lead and copper smelting furnaces contains
  2. \Slag\, v. i. & t. [imp. & p. p. {Slagged}; p. pr. & vb. n.
    {Slagging}.] (Metal.)
    To form, or form into, a slag; to agglomerate when heated
    below the fusion point.
  3. \Slag\, n. [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
    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}.
 Definition: the material residue of smelting processes from metalworking. Analysis is often necessary to distinguish slags derived from copper smelting from those produced in iron production. Crucible slags (from the casting process) may be distinguished from smelting slags by their high concentration of copper.