Diarrhea

n. abnormally frequent and fluid bowel movements

Diarrhea (in American English) or diarrhoea (in British English) is a condition in which the sufferer has frequent watery, loose bowel movements (from the Greek word διάρροια; literally meaning "through-flowing").  Acute infectious diarrhea is a common cause of death in developing countries (particularly among infants), accounting for 5 to 8 million deaths annually. Much of the incidence of these deaths is due to the lack of adequate safe water and lack of sewage treatment capacity; the separation of drinking water from contaminated sewage is also a major issue.
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To most individuals, diarrhea means an increased frequency or decreased consistency of bowel movements; however, the medical [more]Diarrhea - Community and Resources

Noun
1. frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor
(synonym) diarrhoea, looseness of the bowels
(hypernym) symptom
(hyponym) the shits, the trots
(part-holonym) dysentery

(n.)
Alt. of Diarrhoea