noun. A poisonous white crystalline alkaloid, C₁₇H₂₃NO₃, isometric with atropine and having similar uses but more potent effects.

noun. A crystalline alkaloid (C₁₇H₂₃ NO_;3) obtained from Hyoscyamus niger, or henbane. When moist it has a strong alkaline reaction, and a penetrating, narcotic, and stupefying odor like that of nicotine. It neutralizes acids, forming salts, some of which, particularly the sulphate, are used in medicine. The alkaloid is extremely poisonous.

noun. 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.

noun. an alkaloid, the stereoisomer of atropine, used medicinally to treat abdominal pain and similar conditions

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

"The chemical constituents of Henbane are "hyoscyamine," a volatile alkaloid, with a bitter principle, "hyoscypricin" (especially just before flowering), also nitrate of potash, which causes the leaves, when burnt, to sparkle with a deflagration, and other inorganic salts."

amorphous hyoscyamine  

alkaloid  poison  poisonous substance  toxicant  

alkaloid  atropine  autoinjector  belladonna  ephedrine  

duboisine  hyoscyamia