Chem.
any of the class of blue pigments having the highest tinting strength, by weight, of all known blue pigments: used chiefly in the manufacture of printing inks.
Chem.
any of the class of blue pigments having the highest tinting strength, by weight, of all known blue pigments: used chiefly in the manufacture of printing inks.
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012