Who was the professor if I may ask? He may have been mine! Etymology is a very niche community at UGA!
entomology from the greek ἔντομον for "insect", the tom actually is the same tom in atom.
- "The Greek word entomon, meaning “notched,” refers to the segmented body plan of the insect."
https://www.britannica.com/science/entomology
- "Etymology : From ἐν- (en-, “in”) + τόμος (tómos, “slice”)."