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Related to cudbear: orcein
A purplish-red dye derived from certain lichens.
[After Cuthbert Gordon, 18th-century Scottish chemist.]
(Dyeing) another name for orchil
[C18: whimsical alteration of Cuthbert, the Christian name of Dr Gordon, 18th-century Scot who patented the dye. See cuddy2]
a violet coloring matter obtained from various lichens, esp. Lecanora tartarea.
[1760–70; coinage by Cuthbert Gordon, 18th-century Scottish chemist, based on his own name]