\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.