Calabar bean(redirected from Calabar beans)
Also found in: Dictionary, Thesaurus.
The dried seed of Physostigma venenosum (family Leguminosae), a vine of western Africa; it contains the alkaloids physostigmine (eserine), eseramine, eseridine (geneserine) and physovenine; at toxic doses, it causes vomiting, colic, salivation, diarrhea, convulsions, sweating, dyspnea, vertigo, slow pulse, and extreme prostration.
[G. physa, bellows, + stigma, a mark, spot; so called because of the shape of the stigma]
Farlex Partner Medical Dictionary © Farlex 2012
The poisonous seed of a tropical western African woody vine (Physostigma venenosum) in the pea family, the source of physostigmine.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Calabar beanHerbal medicine
A climbing vine native to Africa that contains physostimine, which causes death by inducing muscle contractions to the point of rigidity.
Pupillary constriction, stimulates smooth muscle of the gastrointestinal tract, causing brachycardia and hypertension; synthetic derivatives (e.g., neostigmine) are used for myasthenia gravis, and in ophthalmology to prevent glaucoma.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
Calabar beanThe poisonous seed of the African plant Physostigma venenosum , the source of the drug PHYSOSTIGMINE.
Collins Dictionary of Medicine © Robert M. Youngson 2004, 2005