Calabar bean definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
the large, brown, poisonous seed of a woody, leguminous tropical African vine (Physostigma venenosum) used in medicine as a source of physostigmine
Origin: after Calabar, name of a river and amp; town in southern Nigeria
Calabar bean definition by American Heritage Dictionary
The poisonous seed of a tropical western African woody vine (Physostigma venenosum) in the pea family, which has been used as an ordeal poison and is the source of the drug physostigmine. Also called ordeal bean.
Origin: After Calabar, a town of southeast Nigeria.