ghoul
in popular legend, demonic being believed to inhabit burial grounds and other deserted places. In ancient Arabic folklore, ghuls belonged to a diabolic class of jinn (spirits) and were said to be the offspring of Iblis, the Muslim prince of darkness. They were capable of constantly changing form, but their presence was always recognizable by their unalterable sign: ass's hooves.
Learn more about ghoul with a free trial on Britannica.com.