sco·pol·a·mine (sk?-p?l??-m?n?, -m?n)n. An alkaloid drug, C17H21NO4, extracted from plants such as henbane and used primarily to treat motion sickness and nausea and to dilate the pupil. Also called hyoscine.[New Latin Scopolia, plant genus (after Giovanni Antonio Scopoli (1723-1788), Italian naturalist) + -amine.]American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.scopolamine (sk??p?l??mi?n; -m?n; ?sk??p??læm?n) n (Biochemistry) a colourless viscous liquid alkaloid extracted from certain plants, such as henbane: used in preventing travel sickness and as an anticholinergic, sedative, and truth serum. Formula: C17H21NO4. Also called: hyoscine See also atropine[C20 scopol- from New Latin scopolia Japonica Japanese belladonna (from which the alkaloid is extracted), named after G. A. Scopoli (1723?88), Italian naturalist, + amine]Collins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014sco?pol?a?mine (sk??p?l ??min, -m?n, ?sko? p??læm ?n) n. a colorless, syrupy, water-soluble alkaloid, C17H21NO4, obtained from certain plants of the nightshade family, used as a sedative, antinauseant, and to dilate the pupils. [1890?95;