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.
Definition of monrolite in US English:
monrolite
nounˈmʌnrə(ʊ)lʌɪt
Mineralogy historical
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.