quaternary silver
noun
: silver containing three alloying elements and used for coinage
former British coinage of quaternary silver containing 50 percent silver, 40 percent copper, 5 percent nickel, and 5 percent zinc
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“Quaternary silver.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/quaternary%20silver. Accessed 30 Nov. 2024.
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