Meph·i·stoph·e·les 
(mĕf′ĭ-stŏfə-lēz′) also Me·phis·to (mə-fĭstō)
(mĕf′ĭ-stŏfə-lēz′) also Me·phis·to (mə-fĭstō)n.
The devil in the Faust legend to whom Faust sold his soul.
Me·phis′to·phele·an, Me·phis′to·pheli·an (mə-fĭs′tō-fēlē-ən, -fēlyən, mĕf′ĭ-stō-) adj.