Entomology definition of Umbone September 14, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Umbone Entomology definition of Umbone: an embossed, elevated knob situated on humeral angle of elytra. Entomology Umbone definitionUmbone Entomology explanationUmbone Entomology meaningReviews & Comments