Entomology definition of Notum September 12, 2014 Raj Entomology Dictionary 0 Please Like Us!!! DesiGoogly.com > Education News > Entomology Dictionary > Entomology definition of Notum Entomology definition of Notum: the dorsal or upper part of a segment: = tergum. Entomology Notum definitionNotum Entomology explanationNotum Entomology meaningReviews & Comments