from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A red colouring matter derived from phenol. Used as an indicator.
from the GNU version of the Collaborative International Dictionary of English
- n. A red coloring matter derived from phenol; -- called also, in commerce, yellow corallin.
from The Century Dictionary and Cyclopedia
- n. The commercial name for impure rosolic acid (which see, under rosolic), one of the coaltar colors.
From Latin aurum ("gold"). (Wiktionary)