The Collaborative International Dictionary
Euthiochroic
Euthiochroic \Eu`thi*o*chro"ic\, a. [Gr. e'y^ well + ? sulphur + ? color.] (Chem.) Pertaining to, or denoting, an acid so called.
Euthiochroic acid (Chem.), a complex derivative of hydroquinone and sulphonic (thionic) acid. -- so called because it contains sulphur, and forms brilliantly colored (yellow) salts.