0 an alloy (= mixture) of copper and nickel and other metals that is used in making coins in many countries
It will be a seven-sided cupronickel coin with a constant rolling diameter of 21·4 millimetres, 1·75 millimetres thick, and weighing 5 grammes.
Cupronickel might look like silver, but is, in fact, different.
In 1951, in response to the banks' demands, about one-fifth (by value) of the year's issue of cupronickel coins consisted of half-crowns.
One will be cupronickel struck to the standard of ordinary coinage; the other will be silver struck to proof standard.
He also said that he was not out to defend cupronickel, but nevertheless he put up a very good defence for that particular alloy.
There is no alloy in it; there is no cupronickel about it.
The cupronickel coins consist of a 5-new-penny and a 10-new-penny piece.
Nickel is harder than cupronickel.
