- 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.
Definition
[ n.]