Ceruleum

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  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 1913 Suppl.]