'Belladonna' definitions:

Definition of 'belladonna'

(from WordNet)
noun
Perennial Eurasian herb with reddish bell-shaped flowers and shining black berries; extensively grown in United States; roots and leaves yield atropine [syn: belladonna, belladonna plant, deadly nightshade, Atropa belladonna]
noun
An alkaloidal extract or tincture of the poisonous belladonna plant that is used medicinally

Definition of 'Belladonna'

From: GCIDE
  • Belladonna \Bel`la*don"na\, n. [It., literally fine lady; bella beautiful + donna lady.] (Bot.) (a) An herbaceous European plant (Atropa belladonna) with reddish bell-shaped flowers and shining black berries. The whole plant and its fruit are very poisonous, and the root and leaves are used as powerful medicinal agents. Its properties are largely due to the alkaloid atropine which it contains. Called also deadly nightshade. (b) A species of Amaryllis (Amaryllis belladonna); the belladonna lily. [1913 Webster]