Diarrhoea :: Diarrhoea (n.) A morbidly frequent and profuse discharge of loose or fluid evacuations from the intestines, without tenesmus; a purging or looseness of the bowels; a flux..
Diarrhoeal :: Diarrhoeal (a.) Of or pertaining to diarrhea; like diarrhea.
Diarrhoetic :: Diarrhoetic (a.) Producing diarrhea, or a purging..