Entomology definition of Umbones September 14, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Umbones Entomology definition of Umbones: two movable spines on the sides of prothorax in some Coleoptera. Entomology Umbones definitionUmbones Entomology explanationUmbones Entomology meaningReviews & Comments