Definition of melaconite in US English:

melaconite

noun

Mineralogy
  • An earthy impure black oxide of copper; a form of tenorite containing hydrated copper silicate and carbonate.

Origin

Mid 19th century; earliest use found in James Dana (1813–1895), geologist, zoologist, and teacher. Alteration of melaconise after -ite; compare conite.

Pronunciation

melaconite

/mɪˈlakənʌɪt/