Dictionary

Calabar bean

noun Cal·a·bar bean \ˈka-lə-ˌbär-\

Definition of CALABAR BEAN

:  the dark brown highly poisonous leguminous seed of a tropical west African woody vine (Physostigma venenosum) that is used as a source of physostigmine and was used formerly as an ordeal poison in African witchcraft trials
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Origin of CALABAR BEAN

Calabar, Nigeria
First Known Use: 1864
Medical Dictionary

Calabar bean

noun Cal·a·bar bean \ˈkal-ə-ˌbär-\

Medical Definition of CALABAR BEAN

:  the dark brown poisonous seed of a tropical African woody vine of the genus Physostigma (P. venenosum) that is used as a source of physostigmine

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