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The combining form –stomy is used like a suffix meaning “opening,” specifically openings made in surgery in or between parts of the body. It is often in many medical terms.

The form -stomy comes from the Greek ����ó����, meaning “mouth” or “opening.” This root is the source of the English word stoma (a surgical opening) and is related to stomach. Stomach? Our stomachs and mouths are certainly connected—and etymologically so, too. Discover the connection at our entry for the word.

Closely related to -stomy are -stome and -stomous. Corresponding forms of -stomous combined to the beginning of words are stomato- and stomat-. Learn more about the specific applications of these forms at our �������t¶��s That Use articles for them.

An example of a word you may have encountered that features -stomy ������colostomy. A colostomy is the construction of an artificial opening from the colon through the abdominal wall. Most people are familiar with this term from the expression colostomy bag, “a receptacle worn over the stoma to collect feces following a colostomy.”

The first part of the word, colo-, is a combining form representing the colon, a part of the large intestine. As we have seen, the -stomy part of the word means “opening.” Colostomy literally translates to “colon opening.”

What are some words that use the combining form -stomy?

• arthrostomy
• cholangiostomy
• choledochostomy
• colocolostomy
• cystostomy
• duodenostomy
• enterostomy
• gastrostomy
• gastroenterostomy
• ileostomy
• ileoileostomy
• jejunostomy
• salpingostomy
• ureterostomy
• urostomy
• ventriculostomy

What are some other forms that -stomy may be commonly confused with?

• -soma
• -some
• -tome
• -tomous
• -tomy

The combining form gastro- means “stomach.” What does the surgical procedure of a gastrostomy involve, generally speaking?