SINCE 1828
cupronickel
noun
cu·pro·nick·el
| \ ˌkyü-prō-ˈni-kəl
, ˌkü-\
, ˌkü-\
Definition of cupronickel
: an alloy of copper and nickel
especially
: one containing about 70 percent copper and 30 percent nickel
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Merriam-Webster unabridged
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