a semihard, hydrous mineral, KAl(SO)(OH), used to produce alum
Origin of aluniteFrench from alun from Classical Latin alumen, alum
A gray mineral, chiefly KAl3(SO4)2(OH)6, used in making alum and fertilizer.
Origin of aluniteFrench from alun alum from Latin alūmen
From its earlier name aluminilite, named in 1824.