Calabar bean
Cal·a·bar bean
noun \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
Origin of CALABAR BEAN
Calabar, Nigeria
First Known Use: 1864
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