Entomology definition of Prosternum September 12, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Prosternum Entomology definition of Prosternum: the fore-breast: the sclerite between the fore-legs. Entomology Prosternum definitionProsternum Entomology explanationProsternum Entomology meaningReviews & Comments