Definition of dudleyite in English:

dudleyite

noun

Mineralogy
rare, disused
  • A brownish-yellow mica-like mineral, later regarded as a form of margarite.

Origin

Late 19th century. From dudley- (in the name of Dudleyville, a town in Alabama, where there is a significant deposit of the mineral) + -ite.

Pronunciation

dudleyite

/ˈdʌdlɪʌɪt/