Ostomy

n. surgical opening of an organ to allow for the secretion of waste, opening of the intestines (Medicine)

In medicine, a stoma (Greek - plr. stomata) is an opening, usually unnatural or surgically created, which connects a portion of the body cavity to the outside environment. Surgical procedures in which stomata are created are ended in the suffix '-ostomy' and begun with a prefix denoting the organ or area being operated on.
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A surgical procedure creating an opening in the body for the discharge of body wastes. [more]Ostomy - Community and Resources

Noun
1. surgical procedure that creates an artificial opening for the elimination of bodily wastes
(hypernym) operation, surgery, surgical operation, surgical procedure, surgical process
(hyponym) colostomy

An operation to create an opening from an area inside the body to the outside. See glossary entry for colostomy.

suffix
meaning an operation to make an opening