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The poisonous seed of a tropical western African woody vine (Physostigma venenosum) in the pea family, the source of physostigmine.
[After Calabar, a town of southeast Nigeria.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Calabar bean(ˌkæləˈbɑː; ˈkæləˌbɑː)
1. (Plants) 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
2. (Pharmacology) 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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
the poisonous seed of an African climbing plant, Physostigma venenosum, of the legume family, the active principle of which is physostigmine.
[1875–80; after Calabar]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||calabar bean - dark brown highly poisonous seed of the calabar-bean vine; source of physostigmine and used in native witchcraft|
bean - any of various seeds or fruits that are beans or resemble beans
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