Entomology definition of Callus September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Callus Entomology definition of Callus: a small callosity. Callus Entomology explanationCallus Entomology meaningEntomology Callus definitionReviews & Comments