n. [ OE. dwale, dwole, deception, deadly nightshade, AS. dwala, dwola, error, doubt; akin to E. dull. See Dull, a. ] 1. (Bot.) The deadly nightshade (Atropa Belladonna), having stupefying qualities. [ 1913 Webster ]

2. (Her.) The tincture sable or black when blazoned according to the fantastic system in which plants are substituted for the tinctures. [ 1913 Webster ]

3. A sleeping potion; an opiate. Chaucer. [ 1913 Webster ]