hyoscyamine[hī′ə sī′ə mēn′, -min]
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 hyoscyamine; from 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 + –ine2.