Cud"bear` (k?d"b?r`), n. [Also
cudbeard, corrupted fr. the name of Dr. Cuthbert
Gordon, a Scotchman, who first brought it into notice.]
1. 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.
2. (Bot.) A lichen (Lecanora
tartarea), from which the powder is obtained.