gas·trec·to·my (g?-str?k?t?-m?)n. pl. gas·trec·to·mies Surgical excision of part or all of the stomach.American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.gastrectomy (?æs?tr?kt?m?) n, pl -mies (Surgery) surgical removal of all or part of the stomachCollins English Dictionary ? Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014gas?trec?to?my (gæ?str?k t? mi) n., pl. -mies. partial or total surgical removal of the stomach. [1885?90] Random House Kernerman Webster’s College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.gastrectomySurgery to remove the stomach, either part or whole.Dictionary of Unfamiliar Words by Diagram Group Copyright © 2008 by Diagram Visual Information Limited