ileostomy

n. surgical opening made in the lower intestine (Medicine)

An ileostomy is a stoma that has been constructed by bringing the end of the small intestine (the ileum) out onto the surface of the skin. Intestinal waste passes out of the ileostomy and is collected in an external pouching system  stuck to the skin. Ileostomies are usually sited above the groin on the right hand side of the abdomen.
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Ileostomy /il·e·os·to·my/ surgical creation of an opening into the ileum, with a stoma on the abdominal wall. il·e·os·to·my n. 1. [more]Ileostomy - Community and Resources

Noun
1. surgical procedure that creates an opening from the ileum through the abdominal wall to function as an anus; performed in cases of cancer of the colon or ulcerative colitis
(hypernym) ostomy

[il-ee-AHS-toe-mee]
An opening into the ileum, part of the small intestine, from the outside of the body. An ileostomy provides a new path for waste material to leave the body after part of the intestine has been removed.