cupronickel

== English == === Etymology === From cupro- +‎ nickel, likely a calque of German Kupfernickel. (Can this(+) etymology be sourced?) Piecewise doublet of copper-nickel and kupfernickel. === Noun === cupronickel (countable and uncountable, plural cupronickels) An alloy of copper containing from 10 to 40% nickel. ==== Translations ====