Thionine

1 definition found

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