-ˈkash(ē)əs, -ˈkäsēəs
Usage: usually capitalized C
Etymology: after Andreas Cassius died 1673? German physician
: a purple pigment prepared usually by precipitation from solutions of gold chloride and stannous chloride, consisting of colloidal gold and stannic oxide, and used chiefly in coloring ceramic glazes and ruby glass and in a very delicate test for gold