from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. methyl orange
from the GNU version of the Collaborative International Dictionary of English
- n. An artificial, orange dyestuff, analogous to tropaolin, and like it used as an indicator in alkalimetry; -- called also methyl orange.
from The Century Dictionary and Cyclopedia
- n. A coal-tar color used in dyeing. It is the ammonia salt of dimethyl-aniline-azobenzene-sulphonic acid. It produces a fiery orange on silk and wool. Also called gold orange.
Probably Latin helianthes, "sunflower", alluding to its colour. (Wiktionary)
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