Definition of monrolite in English:

monrolite

Pronunciation /ˈmʌnrə(ʊ)lʌɪt/

noun

historical Mineralogy
  • A mineral now regarded as identical with sillimanite.

Origin

Mid 19th century; earliest use found in Benjamin Silliman. From Monroe, the name of a town in the Catskill Mountains, New York State, the mineral's locality + -lite.