Entomology definition of Labial segment September 9, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Labial segment Entomology definition of Labial segment: the 7th segment of head = second maxillary segment. Entomology Labial segment definitionLabial segment Entomology explanationLabial segment Entomology meaningReviews & Comments