Entomology definition of Arista September 7, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Arista Entomology definition of Arista: a specialized bristle or process on antennae of certain Diptera. Arista Entomology explanationArista Entomology meaningEntomology Arista definitionReviews & Comments