granitite

[ gran-i-tahyt ]
/ ˈgræn ɪˌtaɪt /

noun

a granite rich in biotite.

Origin of granitite

First recorded in 1870–75; granite + -ite1

British Dictionary definitions for granitite

granitite
/ (ˈɡrænɪˌtaɪt) /

noun

any granite with a high content of biotite