Source : Webster's Revised Unabridged Dictionary (1913)

Diarrhetic \Di`ar*rhet"ic\, Diarrhoetic \Di`ar*rh[oe]t"ic\, a.
   (Med.)
   Producing diarrhea, or a purging.

Source : WordNet®

diarrhoetic
     adj : of or relating to diarrhea [syn: {diarrheal}, {diarrhoeal},
           {diarrhetic}, {diarrheic}, {diarrhoeic}]