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roccella |
2 definitions found From Webster's Revised Unabridged Dictionary (1913) [web1913]: 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. From WordNet r 1.6 [wn]: roccella n : a source of the dye archil and of litmus [syn: {Roccella tinctoria}]
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