a colorless, crystalline, very poisonous alkaloid, CHNO, obtained from henbane and other plants of the nightshade family: it is used in medicine as a sedative, antispasmodic, etc.
Origin of hyoscyaminefrom Classical Latin hyoscyamus, henbane ( from Classical Greek hyoskyamos from hys, pig (see hyena) + kyamos, bean) + -ine
A poisonous white crystalline alkaloid, C17H23NO3, isometric with atropine and having similar uses but more potent effects.
Origin of hyoscyamineNew Latin Hyoscyamus henbane genus ; see hyoscine . -ine 2