from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A pigment extracted from madder by sulphuric acid. It consists essentially of alizarin.
from the GNU version of the Collaborative International Dictionary of English
- n. An extract of madder by sulphuric acid. It consists essentially of alizarin.
from The Century Dictionary and Cyclopedia
- n. The product obtained by treating pulverized madder, previously exhausted with water, with concentrated sulphuric acid at 100° C. (212° F.), and again washing with water.
French garance madder, Latin garantia. (Wiktionary)