Entomology definition of Dilation September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Dilation Entomology definition of Dilation: an expansion or widening. Dilation Entomology explanationDilation Entomology meaningEntomology Dilation definitionReviews & Comments