/ ˌæljəˈmɪniəm; NAmE ; ˌælə-/ ( BrE ) ( NAmE alu·mi·num / əˈluːmɪnəm; NAmE /) noun
[ U ] ( symb Al ) a chemical element. Aluminium is a light, silver-grey metal used for making pans, etc. :
aluminium saucepans / window frames
aluminium foil (= for example, for wrapping food in)
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WORD ORIGIN
early 19th cent.: from alumina + -ium .