Thi"on*ine (?), n. [Gr. &?; brimstone, sulphur.] (Chem.) An artificial red or violet dyestuff consisting of a complex sulphur derivative of certain aromatic diamines, and obtained as a dark crystalline powder; -- called also phenylene violet.

Thi"on*ine (?), n. [Gr. &?; brimstone, sulphur.] (Chem.) An artificial red or violet dyestuff consisting of a complex sulphur derivative of certain aromatic diamines, and obtained as a dark crystalline powder; -- called also phenylene violet.