Atropine \At"ro*pine\, n. [Gr. ? inflexible; hence ? ?, one of the three Parc[ae]; 'a priv. + ? to turn.] (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}. [1913 Webster]
Daturine \Da*tu"rine\, n. [From {Datura}.] (Chem.) Atropine; -- called also {daturia} and {daturina}. [1913 Webster]