- a poisonous alkaloid, C17H23NO3, obtained from henbane and other solanaceous plants, used as a sedative, analgesic, mydriatic, and antispasmodic.
Origin of hyoscyamine
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Examples from the Web for hyoscyamine
Hyoscyamine is mainly identified by its power of dilating the pupil of the eye.
In 1832 Robiquet discovered codeine; and in 1833 atropine, aconitine, and hyoscyamine were distinguished by Geiger and Hesse.
Hyoscyamine gives no crystalline sublimate; it melts at 89°, and appears to volatilise in great part without decomposition.
According to a research by Ladenburg, hyoscyamine is associated with atropine, both in the Belladonna and Datura plants.
Hyoscyamine neutralises acids fully, and forms crystallisable salts, which assume for the most part the form of needles.
- a poisonous alkaloid occurring in henbane and related plants: an optically active isomer of atropine, used in medicine in a similar way. Formula: C 17 H 23 NO 3
C19: from New Latin, from Greek huoskuamos (from hus pig + kuamos bean) + amine
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
- A poisonous white crystalline alkaloid isometric with atropine and having similar uses but more potent effects.
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