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Definition of Roccellin
1. n. A red dyestuff, used as a substitute for cochineal, archil, etc. It consists of the sodium salt of a complex azo derivative of naphtol.
Medical Definition of Roccellin
1. 1. A violet dye obtained from several species of lichen (Roccella tinctoria, etc), which grow on maritime rocks in the Canary and Cape Verd Islands, etc. 2. The plant from which the dye is obtained. Alternative forms: orchal and orchil. Origin: OF. Orchel, orcheil, It. Orcella, oricello, or OSp. Orchillo. Cf. Orchil. Source: Websters Dictionary (01 Mar 1998)
Lexicographical Neighbors of Roccellin
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