Diarrhea \Di`ar*rhe"a\, Diarrhoea \Di`ar*rh[oe]"a\, n. [L. diarrhoea, Gr. ?, fr. ? to flow through; ? + ? to flow; akin to E. stream. See Stream.]

(Med.) 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.

Source: Webster's Revised Unabridged Dictionary (1913)