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3 definitions found
 for aluminum
From The Collaborative International Dictionary of English v.0.48 :

  Aluminum \A*lu"mi*num\ ([.a]*l[=u]*m[i^]*n[u^]m), n.
     The metallic element forming the base of alumina. This metal
     is white, but with a bluish tinge, and is remarkable for its
     resistance to oxidation, and for its lightness, having a
     specific gravity of about 2.6. Atomic weight 27.08. Symbol
     Al. Also called aluminium.
     [1913 Webster +PJC]

From WordNet (r) 3.0 (2006) :

  aluminum
      n 1: a silvery ductile metallic element found primarily in
           bauxite [syn: aluminum, aluminium, Al, atomic number
           13]

From The Elements (07Nov00) :

  aluminum
  Symbol: Al
  Atomic number: 13
  Atomic weight: 26.9815
  Silvery-white lustrous metallic element of group 3 of the periodic
  table.
  Highly reactive but protected by a thin transparent layer of the oxide
  which quickly forms in air. There are many alloys of aluminum, as well
  as
  a good number of industrial uses. Makes up 8.1% of the Earth's crust, by
  weight. Isolated in 1825 by H.C. Oersted.
  

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