Calabar bean


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Cal·a·bar bean

 (kăl′ə-bär)
n.
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.]

Calabar bean

(ˌkæləˈbɑː; ˈkæləˌbɑː)
n
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

Cal′abar bean`


n.
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]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.calabar bean - dark brown highly poisonous seed of the calabar-bean vine; source of physostigmine and used in native witchcraft
calabar-bean vine, Physostigma venenosum - tropical African woody vine yielding calabar beans
bean - any of various seeds or fruits that are beans or resemble beans
References in periodicals archive ?
The main clue to his fate came when a lab report showed his intestine contained traces of the African calabar bean, a powerful poison used by adherents of voodoo.
Pal, a physiologist in Vienna, was performing experiments on paralysed dogs to study the effects on peristalsis of physostigmine, a derivative of the Calabar bean (1).
He had been poisoned by a toxic calabar bean used in West African witchcraft rituals.