from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of various synthetic blue or green dyes.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a class of blue or green dyes produced by oxidation of phenols and aromatic diamines
from the GNU version of the Collaborative International Dictionary of English
- n. Any one of a series of artificial blue dyestuffs, resembling indigo in appearance, and obtained by the action of phenol on certain nitrogenous derivatives of quinone. Simple indophenol proper, the parent compound of the dye series, is a quinonimine derivative with the formula C12H9NO2.
from The Century Dictionary and Cyclopedia
- n. A coal-tar color used in dyeing, produced by the simultaneous oxidation of a phenol and a paradiamine. It comes into commerce as a blue powder resembling indigo. It produces on cotton and wool indigo-blue shades, fast to light and bleaching-powder, but destroyed by even weak acids.
ind(igo) + phenol.(American Heritage® Dictionary of the English Language, Fourth Edition)