a silver-white metallic chemical element that is hard and malleable, with similar magnetic properties to iron, capable of a high polish and resistant to corrosion, occurs naturally in various ores, and is used in coins and in alloys: symbol Ni, atomic number 28
a US coin worth five cents
a US coin containing one part of nickel to three of copper, and worth five cents
the sum of five US cents
[German Kupfernickel niccolite (a mineral largely composed of a nickel arsenide), prob from Kupfer copper + Nickel goblin; from the deceptive copper colour of niccolite]