Medical Dictionary

belladonna

noun bel·la·don·na \ˌbel-ə-ˈdän-ə\

Medical 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

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