D defs.my
Entry 1 sense Webster, 1913

Niccolite

/nĭk'-əl-ītˌ/ · Nic·co·lite · IPA /nˈɪkəlˌaɪt/
01 n. A mineral of a copper-red color and metallic luster; an arsenide of nickel; -- called also coppernickel, kupfernickel.
  1. 1.
    A mineral of a copper-red color and metallic luster; an arsenide of nickel; -- called also coppernickel, kupfernickel.(Min.) Also: coppernickel, kupfernickel