At·ro·pine n.  Chem. A poisonous, white, crystallizable alkaloid, extracted from the Atropa belladonna, or deadly nightshade, and the Datura Stramonium, or thorn apple. It is remarkable for its power in dilating the pupil of the eye. Called also daturine.
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 Bel·la·don·na n.  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.
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 Death's-herb n. The deadly nightshade (Atropa belladonna).
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 Dwale n.
 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.
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 Atropa belladonna
      n : perennial Eurasian herb with reddish bell-shaped flowers and
          shining black berries; extensively grown in United
          States; roots and leaves yield atropine [syn: belladonna,
           deadly nightshade]