One of the mysteries of the English language finally explained.
A hard, light alloy of aluminum with copper and other elements.
- ‘Many of the earliest metal propellers were manufactured in one piece of forged Duralumin.’
- ‘He said the shoes were made from the super lightweight alloy metal widely used in aircraft - Duralumin - which had the strength of steel and the lightness of aluminium.’
Early 20th century: perhaps from Latin durus ‘hard’ + aluminum, but probably influenced by Düren, the name of the Rhineland town where such alloys were first produced.
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