The story
From ileo- (“relating to the ileum”) + ileo- (“relating to the ileum”) + -stomy (“surgery creating a communication”).
Etymology from Wiktionary, CC BY-SA 4.0.
ileoileostomy
Today it means: A surgical procedure in which two segments of the ileum are joined together to re-establish continuity of the intestinal tract, typically after removal or bypass of a diseased section, allowing normal passage of intestinal contents. Full definition →