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]
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