Entomology definition of Forehead September 8, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Forehead Entomology definition of Forehead: in Mallophaga, the head in front of the mandibles and antennae. Entomology Forehead definitionForehead Entomology explanationForehead Entomology meaningReviews & Comments