Definitions for ALUMˈæl əm

This page provides all possible meanings and translations of the word ALUM

Princeton's WordNet

  1. alum, ammonia alum, ammonium alum(noun)

    a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum

  2. alum, potassium alum, potash alum(noun)

    a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

  3. alumnus, alumna, alum, graduate, grad(noun)

    a person who has received a degree from a school (high school or college or university)

  4. alum(noun)

    a double sulphate of aluminum and potassium that is used as an astringent (among other things)

Webster Dictionary

  1. Alum(noun)

    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(verb)

    to steep in, or otherwise impregnate with, a solution of alum; to treat with alum

  3. Origin: [OE. alum, alom, OF. alum, F. alun, fr. L. alumen alum.]

Freebase

  1. Alum

    Alum is both a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated potassium aluminium sulfate with the formula KAl(SO4)2·12H2O. More widely, alums are double sulphate salts, with the formula AM(SO4)2·12H2O, where A is a monovalent cation such as potassium or ammonium and M is a trivalent metal ion such as aluminium or chromium.


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