'phenylene violet' definitions:

Definition of 'phenylene violet'

From: GCIDE

Thionine \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}. [1913 Webster]