from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A yellow crystalline substance produced artificially and isomeric with alizarin.

from the GNU version of the Collaborative International Dictionary of English

  • A yellow crystalline substance produced artificially. It is isomeric with alizarin.

from The Century Dictionary and Cyclopedia

  • n. A red, or yellowish-red, crystalline substance, C6H4(CO)2C6H2(OH)2 or 1,4-dihydroxyanthraquinone, made by heating together phthalic anhydrid and hydroquinone; also in other ways. It gives blue solutions with alkalis. It melts at 192–193° C.


From hydroquinone and alizarin (Wiktionary)


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