from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a specific class of anthraquinone vat dyes
from The Century Dictionary and Cyclopedia
- n. A coal-tar color related to anthracene made by fusing beta-amino-anthraquinone with caustic potash. It dyes cotton and other vegetable fibers in a hyposulphite reduction-vat and gives very fast blues. When combined with flavanthrene it gives one of the fastest greens known.
From indigo + anthraquinone (Wiktionary)