Entomology definition of Flank September 8, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Flank Entomology definition of Flank: the sides of the thorax: the pleura. Entomology Flank definitionFlank Entomology explanationFlank Entomology meaningReviews & Comments