| any combination of common disturbances of the bowel, as diarrhea or constipation, occurring with abdominal pain, sometimes accompanied by psychological stress. Abbreviation: IBS |
| irritable bowel syndrome (ĭr'ĭ-tə-bəl) Pronunciation Key
A gastrointestinal disorder without demonstrable organic pathology, characterized by abdominal cramping, constipation, diarrhea, and mucus in the stool. |