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from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A yellowish-red crystalline substance related to anthracene and obtained from opianic acid.

from the GNU version of the Collaborative International Dictionary of English

  • n. A yellowish red crystalline substance related to anthracene, and obtained from opianic acid.

from The Century Dictionary and Cyclopedia

  • n. 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.


Latin rufus reddish + opianic (Wiktionary)


Sorry, no example sentences found.


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