Definition of niccolite in US English:

niccolite

noun

Mineralogy
  • A native nickel arsenide and major ore of nickel, NiAs, occurring as a pale copper-red mineral with a metallic lustre which crystallizes in the hexagonal system.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. From post-classical Latin niccolum + -ite.

Pronunciation

niccolite

/ˈnɪkəlʌɪt/