Entomology definition of Excrescence September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Excrescence Entomology definition of Excrescence: an outgrowth or elevation; usually abnormal. Entomology Excrescence definitionExcrescence Entomology explanationExcrescence Entomology meaningReviews & Comments