Orcin Or"cin, n. [Etymology uncertain: cf. F. orcine.] (Chem.) A colorless crystalline substance, {C6H3.CH3.(OH)2}, which is obtained from certain lichens ({Roccella}, {Lecanora}, etc.), also from extract of aloes, and artificially from certain derivatives of toluene. It changes readily into orcein. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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