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New American Oxford Dictionary

cupro-

cupro- (also cupr- ) ▶comb. form of or relating to copper: cupronickel. ORIGIN from late Latin cuprum .

 

Oxford Dictionary

cupro-

cupro- |ˈkjuːprəʊ |(also cupr- ) ▶combining form relating to copper: cupro-nickel. ORIGIN from late Latin cuprum .

 

cupro-nickel

cupro-nickel |kjuːprəʊˈnɪk (ə )l | ▶noun [ mass noun ] an alloy of copper and nickel, especially in the proportions 3:1 as used in ‘silver ’ coins.