Entomology definition of Second maxillary segment September 13, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Second maxillary segment Entomology definition of Second maxillary segment: the seventh or labial segment of head. Entomology Second maxillary segment definitionSecond maxillary segment Entomology explanationSecond maxillary segment Entomology meaningReviews & Comments