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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Or·cin n.  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.
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From: WordNet (r) 2.0

 lecanora
      n : any lichen of the genus Lecanora; some used in dyeing; some
          used for food