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Definition of Alum

Alum

  1. A double sulphate formed of aluminium and some other element (esp. an alkali metal) or of aluminium. It has twenty-four molecules of water of crystallization.
  2. To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.

Alum Translations

alum in Spanish is alumbre
alum in Swedish is alun