a combining form meaning “cutting, incision” of an organ, “excision” of an object, as specified by the initial element (appendectomy; lithotomy); also occurring in abstract nouns corresponding to adjectives ending in -tomous (dichotomy).
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British Dictionary definitions for -tomy
n combining form
indicating a surgical cutting of a specified part or tissuelobotomy
Word Origin for -tomy
from Greek -tomia; see -tome
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for -tomy
word-forming element meaning "a cutting," from Greek -tomia "a cutting of," from tome "a cutting, section" (see tome).
Online Etymology Dictionary, © 2010 Douglas Harper
Medicine definitions for -tomy
Act of cutting; incision:gastrotomy.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.