Definition of montmartrite in English:

montmartrite

Pronunciation /mɒntˈmɑːtrʌɪt/ /ˌmɒ̃ˈmɑːtrʌɪt/

noun

historical Mineralogy
  • A variety of gypsum containing calcium carbonate.

Origin

Early 19th century; earliest use found in Andrew Ure (1778–1857), chemist. From French montmartrite from Montmartre, the name of a hill and suburb of Paris, the mineral's locality + -ite.