Entomology definition of Opacus September 12, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Opacus Entomology definition of Opacus: opaque; a surface without any lustre. Entomology Opacus definitionOpacus Entomology explanationOpacus Entomology meaningReviews & Comments