Entomology definition of Setaceous September 13, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Setaceous Entomology definition of Setaceous: bristle-shaped: slender, gradually tapering to a tip. Entomology Setaceous definitionSetaceous Entomology explanationSetaceous Entomology meaningReviews & Comments