NOUN
- dark brown highly poisonous seed of the calabar-bean vine; source of physostigmine and used in native witchcraft
How To Use calabar bean In A Sentence
- Julian was interested in medicinal plants, particularly the Calabar bean whose active principle, physostigmine, was first isolated by the German chemists Jobst and Hesse in 1864.
- But since physostigmine could be isolated only from the Calabar bean, the drug was not readily available.