Entomology definition of Trimerous September 14, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Trimerous Entomology definition of Trimerous: species which have the tarsi three-jointed. Entomology Trimerous definitionTrimerous Entomology explanationTrimerous Entomology meaningReviews & Comments