Dictionary![]() ![]() bel•la•don•naPronunciation: (bel"u-don'u), [key] —n. 1. Also called deadly nightshade. a poisonous plant, Atropa belladonna, of the nightshade family, having purplish-red flowers and black berries. 2. Pharm.a drug from the leaves and root of this plant, containing atropine and related alkaloids: used in medicine to check secretions and spasms, to relieve pain or dizziness, and as a cardiac and respiratory stimulant. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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