GNU Collaborative International Dictionary of English

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Found one definition

1.       
   Cudbear , n. [Also cudbeard, corrupted fr. the name of Dr. Cuthbert Gordon, a Scotchman, who first brought it into notice.]
   A powder of a violet red color, difficult to moisten with water, used for making violet or purple dye. It is prepared from certain species of lichen, especially Lecanora tartarea.
   Ure.
   
   1913 Webster
   (Bot.) A lichen (Lecanora tartarea), from which the powder is obtained.
   1913 Webster