- a combining form meaning “stomach,” used in the formation of compound words: gastrology.
Also especially before a vowel, gastr-.
Origin of gastro-
< Greek, combining form of gastḗr
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often before a vowel gastr-
- stomachgastroenteritis; gastritis
from Greek gastēr
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 gastro-
scientific word-forming element meaning "stomach," before vowels gastr-, from Greek gastro-, comb. form of gaster (genitive gastros) "belly, paunch" (see gastric).
Online Etymology Dictionary, © 2010 Douglas Harper
- Stomach; gastric:gastritis.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.