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"Atropine" Definition
noun
A poisonous, bitter, crystalline alkaloid, C17H23NO3, obtained from belladonna and other related plants. It is used to dilate the pupils of the eyes and as an antispasmodic.
A racemic mixture of hyoscyamine obtained from any of various solanaceous plants (as belladonna) and used especially in the form of its sulfate for its anticholinergic effects (as pupil dilation or inhibition of smooth muscle spasms).