Hyoscyamine

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Hyoscyamine \Hy`os*cy"a*mine\, n. [See {Hyoscyamus}.] (Chem.)
     An alkaloid found in henbane ({Hyoscyamus niger}), and
     regarded as its active principle. It is also found with other
     alkaloids in the thorn apple and deadly nightshade. It is
     extracted as a white crystalline substance, with a sharp,
     offensive taste. Hyoscyamine is isomeric with atropine, is


     very poisonous, and is used as a medicine for neuralgia, like
     belladonna. Called also {hyoscyamia}, {duboisine}, etc.
     [1913 Webster]

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Duboisine \Du*bois"ine\, n. (Med.)
     An alkaloid obtained from the leaves of an Australian tree
     ({Duboisia myoporoides}), and regarded as identical with
     {hyoscyamine}. It produces dilation of the pupil of the eye.
     [1913 Webster]

From WordNet (r) 2.0 [wn]:

  hyoscyamine
       n : a poisonous crystalline alkaloid (isometric with atropine
           but more potent); used to treat excess motility of the
           gastrointestinal tract