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alum - Meaning and Examples

Meaning of 'alum' (Webster Dictionary)

1 . Alum [ n.]
- 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 . Alum [ v. t.]
- To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.