Cal·a·bar bean (kălʹə-bär) n.
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.
  [After Calabar, a town of southeast Nigeria.]

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Universalium. 2010.

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