Calabar bean Syllabification: (Cal·a·bar bean)Definition of Calabar bean noun the poisonous seed of a tropical West African climbing plant, containing physostigmine and formerly used for tribal ordeals. The plant is Physostigma venosum, family Leguminosae Origin: late 19th century: named after CalabarCalabar bean in other Oxford dictionaries Definition of Calabar bean in the British & World English dictionary
