Gastric

google

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mid 17th century: from modern Latin gastricus, from Greek gastēr, gastr- ‘stomach’.

wiktionary

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From New Latin gastricus, from Ancient Greek γαστήρ, γαστρός(gastḗr, gastrós, “stomach”). Doublet of gastrique.

etymonline

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gastric (adj.)

1650s, from Modern Latin gastricus, from Greek gaster (genitive gastros) "stomach, paunch, belly," often figurative of gluttony or greed, also "womb, uterus; sausage," by dissimilation from *graster, literally "eater, devourer," from gran "to gnaw, eat," from PIE root *gras- "to devour" (source also of Greek grastis "green fodder," Latin gramen "fodder, grass," Old English cærse "cress").