phyllium sp mimicking leaf '''entomology''' ref name liddell ref scientific study insects branch zoology past term insect less specific historically definition entomology would also include study animals arthropod groups arachnids myriapods crustaceans wider meaning may still encountered informal use like several fields categorized within zoology entomology taxon based category form scientific study focus insect related inquiries definition entomology entomology therefore overlaps
Applied science Agriculture Entomology