Definitions
from The Century Dictionary.
- noun A yellowish-red crystalline substance, (OH)2C6H2(CO)2C6H2(OH)2, or tetrahydroxyanthraquinone, made by heating opianic acid to 180° C. with concentrated sulphuric acid: used as a dyestuff.
from the GNU version of the Collaborative International Dictionary of English.
- noun (Chem.) A yellowish red crystalline substance related to anthracene, and obtained from opianic acid.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun chemistry A yellowish-red
crystalline substance related toanthracene and obtained fromopianic acid .
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
Latin rufus reddish + opianic
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