Webster’s Revised Unabridged Dictionary · 1913
Ceruleum
Ce·ru′le·um, n. [NL.] A greenish blue pigment prepared in various ways, consisting essentially of cobalt stannate. Unlike other cobalt blues, it does not change color by gaslight.
Webster’s Revised Unabridged Dictionary · 1913
Ce·ru′le·um, n. [NL.] A greenish blue pigment prepared in various ways, consisting essentially of cobalt stannate. Unlike other cobalt blues, it does not change color by gaslight.