Webster’s Revised Unabridged Dictionary · 1913
Orcin
Or′cin (ôr′sĭn), 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.