duralumin[do̵̅o̅ ral′yo̵̅o̅ min, dyo̵̅o̅-]
a strong, lightweight alloy of aluminum with copper, manganese, magnesium, and silicon
Origin of duralumindur(able) + alumin(um)
An alloy of aluminum that contains copper, manganese, magnesium, iron, and silicon and is resistant to corrosion by acids and seawater.
Origin of duraluminOriginally a trademark.