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Adjective: demoniac  di'mow-nee,ak
  1. Of, pertaining to, or like a demon or possession by a demon
    - demoniacal, possessed
Noun: demoniac  di'mow-nee,ak
  1. Someone who acts as if possessed by a demon

Derived forms: demoniacs

Type of: demon, devil, fiend, monster, ogre

Encyclopedia: Demoniac