| Hyoscine | n. [ See Hyoscyamus. ] (Chem.) An alkaloid found with hyoscyamine (with which it is also isomeric) in henbane, and extracted as a white, amorphous, semisolid substance. [ 1913 Webster ] |
| scopolamine | (n) an alkaloid with anticholinergic effects that is used as a sedative and to treat nausea and to dilate the pupils in ophthalmic procedures, Syn. hyoscine, Example: transdermal scopolamine is used to treat motion sickness; someone sedated with scopolamine has difficulty lying |