a combining form meaning “stomach,” used in the formation of compound words: gastrology.

Nearby words

  1. gastrin,
  2. gastrinoma,
  3. gastritic,
  4. gastritis,
  5. gastritis cystica polyposa,
  6. gastro-omental artery,
  7. gastro-pub,
  8. gastroanastomosis,
  9. gastrocardiac,
  10. gastrocele

Also especially before a vowel, gastr-.

Origin of gastro-

< Greek, combining form of gastḗr Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for gastro-


often before a vowel gastr-

combining form

stomachgastroenteritis; gastritis

Word Origin for gastro-

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

Medicine definitions for gastro-



Stomach; gastric:gastritis.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.