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