Enteritis

n. inflammation of the intestines

Enteritis is the inflammation of the small intestine (inflammation of the large intestine is termed colitis, while enterocolitis refers to an inflammation of both the large and small intestine.).
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Enteritis /en·ter·i·tis/ inflammation of the intestine, especially of the small intestine. regional enteritis Crohn's disease. en·ter·i·tis n. [more]Enteritis - Community and Resources

Noun
1. inflammation of the intestine (especially the small intestine); usually characterized by diarrhea
(hypernym) inflammation, redness, rubor
(hyponym) necrotizing enteritis

n. enteritis, inflammation of the intestines