Entomology definition of Melanism September 9, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Melanism Entomology definition of Melanism: an abnormal or unusual darkening: a suffusion with blackish. Entomology Melanism definitionMelanism Entomology explanationMelanism Entomology meaningReviews & Comments