Entomology definition of Callous September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Callous Entomology definition of Callous: see callosity. Callous Entomology explanationCallous Entomology meaningEntomology Callous definitionReviews & Comments