Main Entry: at·ro·pine

Pronunciation: \ˈa-trə-ˌpēn\

Function: noun

: a racemic mixture of hyoscyamine usually obtained from belladonna and related plants of the family Solanaceae and used especially in the form of its hydrated sulfate (C₁₇H₂₃NO₃)₂·H₂SO₄·H₂O for its anticholinergic effects (as relief of smooth muscle spasms or dilation of the pupil of the eye)