Dwale (?), 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.

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

3. A sleeping potion; an opiate. Chaucer.