Etymology
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colostomy (n.)

1888, from combining form of colon (n.2) + Modern Latin -stoma "opening, orifice," from Greek stoma "opening, mouth" (see stoma). Colotomy "operation of making an incision in the colon" is attested from 1860, from Greek tome "a cutting."

updated on January 22, 2018

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Definitions of colostomy from WordNet

colostomy (n.)
a surgical operation that creates an opening from the colon to the surface of the body to function as an anus;
From wordnet.princeton.edu, not affiliated with etymonline.