Definition of colostomy noun from the Oxford Advanced Learner's Dictionary



BrE BrE//kəˈlɒstəmi//
; NAmE NAmE//kəˈlɑːstəmi//
(pl. colostomies) (medical)
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an operation in which part of a person’s colon (= the lower part of the bowels) is removed and an opening is made in the abdomen through which the person can get rid of waste matter from the body Word Originlate 19th cent.: from colon (the main part of the large intestine) + Greek stoma ‘mouth’.
See the Oxford Advanced American Dictionary entry: colostomy