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.

Boil \Boil\, n. [Influenced by boil, v. See {Beal}, {Bile}.]
   A hard, painful, inflamed tumor, which, on suppuration,
   discharges pus, mixed with blood, and discloses a small
   fibrous mass of dead tissue, called the core.

   {A blind boil}, one that suppurates imperfectly, or fails to
      come to a head.

   {Delhi boil} (Med.), a peculiar affection of the skin,
      probably parasitic in origin, prevailing in India (as
      among the British troops) and especially at Delhi.

Source : WordNet®

Delhi boil
     n : leishmaniasis of the skin; characterized by ulcerative skin
         lesions [syn: {cutaneous leishmaniasis}, {Old World
         leishmaniasis}, {oriental sore}, {tropical sore}, {Aleppo
         boil}]