gastric (adj.) Look up gastric at Dictionary.com
1650s, with -ic + Greek gaster (genitive gastros) "stomach," by dissimilation from *graster, literally "eater, devourer," from gran "to gnaw, eat," from PIE root *gras- "to devour" (cognates: Greek grastis "green fodder," Latin gramen "fodder, grass," Old English cærse "cress").