entomology Look up entomology at Dictionary.com
1766, from Fr. entomologie (1764), coined from Gk. entomon "insect" + logia "study of." Entomon is neut. of entomos "having a notch or cut (at the waist)," so called by Aristotle in reference to the segmented division of insect bodies, from en- "in" + temnein "to cut." Compare insect.
"I have given the name insectology to that part of natural history which has insects for its object; that of entomology ... would undoubtedly have been more suitable ... but its barbarous sound terryfy'd me." [Charles Bonnet's Eng. translation of his "Contemplation de la nature," 1766]