a white or grey clay mineral consisting of hydrated aluminium silicate in triclinic crystalline form, the main constituent of kaolin. Formula: Al2Si2O5(OH)4
kaolinite in American English
(ˈkeɪələˌnaɪt)
noun
a colorless or white, soft mineral, hydrous aluminum silicate, Al2Si2O5(OH)4, that is the main constituent of kaolin