Source : Webster's Revised Unabridged Dictionary (1913)

Psychopomp \Psy"cho*pomp\, n. [Gr. ?; psychh` the soul + ? to
   send: cf. F. psychopompe.] (Myth.)
   A leader or guide of souls . --J. Fiske.

Source : WordNet®

psychopomp
     n : a conductor of souls to the afterworld; "Hermes was their
         psychopomp"