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Definition of: aluminum
(ə·l′mə) ·nəm) noun
An abundant metallic element (symbol Al, atomic number 13) found only in combination, chiefly with oxygen, and having the useful properties of lightness and resistance to oxidation. Also Brit. al·u·min·i·um (al′yə·min′ē·əm). See PERIODIC TABLE. [<NL <L alumen, -minis alum]
—a·lu′mi·nous adjective
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