ALUMINUM
aluminum, aluminium, Al, atomic number
(noun) a silvery ductile metallic element found primarily in bauxite
Source: WordNet® 3.1
Etymology
Noun
aluminum (countable and uncountable, plural aluminums) (American spelling)
A metallic chemical element (symbol Al) with an atomic number of 13.
(countable) A single atom of this element.
(slang) Aircraft or other machinery made partially or wholly of aluminum.
Source: Wiktionary
A*lu"mi*num, n.
Definition: See Aluminium.
Source: Webster’s Unabridged Dictionary 1913 Edition