Webster's Revised Unabridged Dictionary · 1913

Euthiochroic

Euthiochroic , adjective

[Greek e'y^ well + {not transcribed} sulphur + {not transcribed} color.]

(Chemistry) Pertaining to, or denoting, an acid so called.
Collocations (1)
Euthiochroic acid (Chemistry) , a complex derivative of hydroquinone and sulphonic (thionic) acid. -- so called because it contains sulphur, and forms brilliantly colored (yellow) salts.