Entomology definition of Terminal line September 14, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Terminal line Entomology definition of Terminal line: in Lepidoptera, runs along the outer margin of the wings. Entomology Terminal line definitionTerminal line Entomology explanationTerminal line Entomology meaningReviews & Comments