Source : Webster's Revised Unabridged Dictionary (1913)

Calabar \Cal"a*bar\, n.
   A district on the west coast of Africa.

   {Calabar bean}, The of a climbing legumious plant
      ({Physostigma venenosum}), a native of tropical Africa. It
      is highly poisonous. It is used to produce contraction of
      the pupil of the eye; also in tetanus, neuralgia, and
      rheumatic diseases; -- called also {ordeal bean}, being
      used by the negroes in trials for witchcraft.

Source : WordNet®

calabar bean
     n : dark brown highly poisonous seed of the calabar-bean vine;
         source of physostigmine and used in native witchcraft
         [syn: {ordeal bean}]