Definition of melanocerite in US English:

melanocerite

noun

Mineralogy
  • A translucent resinous fluosilicate of cerium and calcium occurring as black or brown tabular crystals of the trigonal system.

Origin

Late 19th century; earliest use found in American Naturalist. From melano- + cerite, after Danish melanocerit.

Pronunciation

melanocerite

/mɛlənə(ʊ)ˈsɪərʌɪt/