noun, plural ostomies.
any of various surgical procedures, as a colostomy, in which an artificial opening is made so as to permit the drainage of waste products either into an appropriate organ or to the outside of the body.

1955–60; generalized from words in which -ostomy is the final element; see -o-, -stomy

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Word Origin & History

1957, abstracted from colostomy "artificial opening in the colon," ult. from Mod.L. stoma "opening, orifice," from Gk. stoma "mouth."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

ostomy os·to·my (ŏs'tə-mē)
Surgical construction of an artificial excretory opening, such as a colostomy.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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