The Collaborative International Dictionary of English v.0.48:

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]

The Collaborative International Dictionary of English v.0.48:

Daturine \Da*tu"rine\, n. [From Datura.] (Chem.)
   Atropine; -- called also daturia and daturina.
   [1913 Webster]