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5 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 al·um /ˈæləm/
 明礬

From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 al·um /ˈæləm/ 名詞
 [=aluminium]鋁

From: Webster's Revised Unabridged Dictionary (1913)

 Al·um n.  Chem. 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.
 Note: ☞ Common alum is the double sulphate of aluminium and potassium. It is white, transparent, very astringent, and crystallizes easily in octahedrons. The term is extended so as to include other double sulphates similar to alum in formula.

From: Webster's Revised Unabridged Dictionary (1913)

 Al·um v. t. To steep in, or otherwise impregnate with, a solution of alum; to treat with alum.
 ◄ ►

From: WordNet (r) 2.0

 alum
      n 1: a white crystalline double sulfate of aluminum: the ammonium
           double sulfate of aluminum [syn: ammonia alum, ammonium
            alum]
      2: a white crystalline double sulfate of aluminum: the
         potassium double sulfate of aluminum [syn: potassium alum,
          potash alum]
      3: a person who has received a degree from a school (high
         school or college or university) [syn: alumnus, alumna,
          graduate, grad]
      4: a double sulphate of aluminum and potassium that is used as
         an astringent (among other things)