Aluminum

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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) 2.0 [wn]:

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

From Elements database 20001107 [elements]:

  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.