| euthiochroic | <chemistry> Pertaining to, or denoting, an acid so called. <chemistry> Euthiochroic acid, a complex derivative of hydroquinone and sulphonic (thionic) acid. So called because it contains sulphur, and forms brilliantly coloured (yellow) salts. Origin: Gr. Well + sulphur + colour. Source: Websters Dictionary (01 Mar 1998) |
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