[doo-ral-yuh-min, dyoo-] /dʊˈræl yə mɪn, dyʊ-/

an alloy of aluminum that is 4 percent copper and contains small amounts of magnesium, manganese, iron, and silicon: used for applications requiring lightness and strength, as in airplane construction.
trademark a light strong aluminium alloy containing 3.5–4.5 per cent of copper with small quantities of silicon, magnesium, and manganese; used in aircraft manufacture


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