C14H6O2OH2
Alizarin A*liz"a*rin, Alizarine A*liz"a*rine, n. [F. alizarine, fr. alizari.] (Chem.) A coloring principle, {C14H6O2(OH)2}, found in madder, and now produced artificially as an an orange-red crystalline compound from anthracene. It is used in making red pigments (such as the Turkish reds), and in dyeing. [1913 Webster WordNet 1.5]

The Collaborative International Dictionary of English. 2000.

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