betony, n. [OE. betony, betany, F. betoine, fr. L. betonica, vettonica.].
A plant of the genus Betonica
(Linn.). [1913 Webster
" The purple or wood betony (Betonica officinalis, Linn.) is common in Europe, being formerly used in medicine, and (according to Loudon) in dyeing wool a yellow color."