Merriam-Webster Collegiate Dictionary - necromancy

 noun  Etymology: alteration of Middle English nigromancie, from Anglo-French, from Medieval Latin nigromantia, by folk etymology from Late Latin necromantia, from Late Greek nekromanteia, from Greek nekr- + -manteia -mancy  Date: 1522  1. conjuration of the spirits of the dead for purposes of magically revealing the future or influencing the course of events  2. magic, sorcery  • necromancer noun  • necromantic adjective  • necromantically adverb