Entomology definition of Second costal cell September 13, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Second costal cell Entomology definition of Second costal cell: in Hymenoptera (Pack.); is the stigma. Entomology Second costal cell definitionSecond costal cell Entomology explanationSecond costal cell Entomology meaningReviews & Comments