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Calabar bean

noun
1.
the violently poisonous seed of an African climbing plant, Physostigma venenosum, of the legume family, the active principle of which is physostigmine.
Also called ordeal bean.
Origin
1875-1880
1875-80; named after Calabar, Nigeria
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for calabar-bean

Calabar bean

/ˌkæləˈbɑː; ˈkæləˌbɑː/
noun
1.
the dark brown very poisonous seed of a leguminous woody climbing plant, Physostigma venenosum of tropical Africa, used as a source of the drug physostigmine
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
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calabar-bean in Medicine

Calabar bean Cal·a·bar bean (kāl'ə-bär)
n.
The poisonous seed of a tropical western African woody vine in the pea family and source of the drug physostigmine.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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