Definition of neocyanite in English:

neocyanite

Pronunciation /ˌniːə(ʊ)ˈsʌɪənʌɪt/

noun

historical Mineralogy
  • A copper silicate mineral occurring as blue platy crystals in the fumaroles of Vesuvius; now regarded as identical with litidionite.

Origin

Late 19th century; earliest use found in American Naturalist. From neo- + cyanite, after Italian neociano.