n. A mineral, a form of nickel arsenide, NiAs, having a metallic lustre and copper-red colour, that is a minor ore of nickel.
the GNU version of the Collaborative International Dictionary of English
n. A mineral of a copper-red color and metallic luster; an arsenide of nickel; -- called also coppernickel, kupfernickel.
The Century Dictionary and Cyclopedia
n. Native nickel arsenide, a mineral occurring usually massive, of a pale copper-red color and metallic luster. Also called copper-nickel and nickeline.
Word Usage
"From very early times nickel-bearing minerals, such as niccolite, were mixed with glass to create green glass."