The Collaborative International Dictionary of English v.0.48:
Gastroenteritis \Gas`tro*en`te*ri"tis\, n. [NL. See Gastroenrteric, and -itis.] (Med.) Inflammation of the lining membrane of the stomach and the intestines. [1913 Webster]WordNet (r) 3.0 (2006):
gastroenteritis n 1: inflammation of the stomach and intestines; can be caused by Salmonella enteritidis [syn: gastroenteritis, stomach flu, intestinal flu]