belladonna

bel·la·don·na

noun \ˌbel-ə-ˈdän-ə\

Definition of BELLADONNA

1

: an Old World poisonous plant of the genus Atropa (A. belladonna) having purple or green flowers, glossy black berries, and a root and leaves that yield atropine—called also deadly nightshade

2

: a medicinal preparation (as atropine) extracted from the belladonna plant and containing anticholinergic alkaloids