Entomology definition of Ectoblast September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Ectoblast Entomology definition of Ectoblast: the outer wall of a cell; the ectoderm or epiblast. Ectoblast Entomology explanationEctoblast Entomology meaningEntomology Ectoblast definitionReviews & Comments