'purple nightshade' definitions:

Definition of 'purple nightshade'

(from WordNet)
noun
Weedy nightshade with silvery foliage and violet or blue or white flowers; roundish berry widely used to curdle milk; central United States to South America [syn: trompillo, white horse nettle, prairie berry, purple nightshade, silverleaf nightshade, silver-leaved nightshade, silver-leaved nettle, Solanum elaeagnifolium]