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A natural or artificial alloy of gold with at least 20 per cent of silver, used for jewellery, especially in ancient times.‘Gold content of naturally occurring electrum in modern Western Anatolia ranges from 70% to 90%.’‘Numismatists firmly believe that the first coins were made of electrum, a naturally-occurring alloy mostly of gold and silver, with traces of other metals.’
Late Middle English via Latin from Greek ēlektron ‘amber, electrum’.
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