-stomy(redirected from -ostomy)
Also found in: Medical.
A surgical operation in which an artificial opening is made into a specified organ or part: colostomy.
[Greek stoma, opening, mouth + -y.]
n combining form
(Surgery) indicating a surgical operation performed to make an artificial opening into or for a specified part: cytostomy.
[from Greek -stomia, from stoma mouth]
a combining form used in the names of surgical operations that involve the establishment of an artificial opening into or between the part or parts specified by the initial element: colostomy.