scoria

  1. Noun.  The slag or dross that remains after the smelting of metal from an ore. (defdate, from 14th c.) .
  2. Noun.  (geology) Rough masses of rock formed by solidified lava, and which can be found around a volcano's crater. (defdate, from 18th c.) .

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This entry was last updated on RefTopia from its source on 3/20/2012.