Entomology definition of Costal area September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Costal area Entomology definition of Costal area: the area behind costal vein; see also, costal field. Costal area Entomology explanationCostal area Entomology meaningEntomology Costal area definitionReviews & Comments