Entomology definition of Epigastrium September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Epigastrium Entomology definition of Epigastrium: the first entire ventral sclerite of the abdomen. Entomology Epigastrium definitionEpigastrium Entomology explanationEpigastrium Entomology meaningReviews & Comments