過か敏びん性せい腸ちょう症しょう候こう群ぐんかびんせいちょうしょうこうぐんMeanings1nounirritable bowel syndrome; IBSmedicine›Medical term for a chronic functional bowel disorder. Commonly abbreviated as IBS in both English and Japanese medical contexts.過か敏びん性せい腸ちょう症しょう候こう群ぐんの