il·e·os·to·my 
(ĭl′ē-ŏstə-mē)
(ĭl′ē-ŏstə-mē)n. pl. il·e·os·to·mies
1. Surgical construction of an artificial excretory opening through the abdominal wall into the ileum.
2. The opening created by such a surgical procedure.
[ILE(UM) + -STOMY.]