Alum in English dictionary

  • alum

    Meanings and definitions of "Alum"

    • (chemistry) the double sulphate of potassium and aluminium with chemical formula K 2 SO 4 .Al 2 (SO 4 ) 3 .24H 2 O.
    • (chemistry) Any similar double sulphate in which either or both of the potassium and aluminium is wholly or partly replaced by other univalent or tervalent cations.
    • (US) A graduate of a university or other institution.
    • noun
      An astringent salt, usually occurring in the form of pale crystals, much used in the dyeing and tanning trade and in certain medicines, and now understood to be a double sulphate of potassium and aluminium (K 2SO 4.Al 2(SO 4) 3.24H 2O). [from 14th c.]
    • noun
      (chemistry)
      Any similar double sulphate in which either or both of the potassium and aluminium is wholly or partly replaced by other univalent or tervalent cations. [from 17th c.]
    • noun
      (US)
      A graduate of a university or other institution.
    • verb
      (transitive)
      To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.
    • A double sulfate
    • noun
      a double sulphate of aluminum and potassium that is used as an astringent (among other things)
    • noun
      a person who has received a degree from a school (high school or college or university)
    • noun
      a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
    • noun
      a white crystalline double sulfate of aluminum: the potassium double sulfate of aluminum

    Synonyms of "Alum" in English dictionary

    scholar, grad, astringent are the top synonyms of "Alum" in the English thesaurus.

    Grammar and declension of Alum

    • alum ( plural  alums)
    • alum (plural alums)
    • alum (third-person singular simple present alums, present participle aluming, simple past and past participle alumed)
  • ALUM
  • Alum

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