One of the mysteries of the English language finally explained.
An alloy, resembling brass, consisting of about three parts copper and one part zinc, used especially for cheap jewellery.
Late 17th century; earliest use found in The London Gazette. From the genitive of prince + metal, the metal being so named after its inventor, Prince Rupert of the Rhine. Compare German Prinzmetall, † Prinzenmetall, French métal de prince.
Prince's metal/ˈprɪnsɪz ˌmɛtl/
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