Source : Webster's Revised Unabridged Dictionary (1913)

Aleppo boil \A*lep"po boil\, button \button\, or evil \evil\ .
   (Med.)
   A chronic skin affection terminating in an ulcer, most
   commonly of the face. It is endemic along the Mediterranean,
   and is probably due to a specific bacillus. Called also
   {Aleppo ulcer}, {Biskara boil}, {Delhi boil}, {Oriental
   sore}, etc.