Source : Webster's Revised Unabridged Dictionary (1913)

Dipsomania \Dip`so*ma"ni*a\, n. [NL., fr. Gr. ? thirst + ?
   mania.] (Med.)
   A morbid an uncontrollable craving (often periodic) for
   drink, esp. for alcoholic liquors; also improperly used to
   denote acute and chronic alcoholism.

Source : WordNet®

dipsomania
     n : an intense persistent desire to drink alcoholic beverages to
         excess [syn: {alcoholism}, {potomania}]