Noun
1. Branch of biology that deals with the study of insects.
2. The scientific study of insects, particularly their taxonomy, morphology, physiology, ecology, as well as their beneficial and harmful impact on humans (biology-online.org)
3. Scientific study of insects, a branch of arthropodology, which in turn is a branch of biology. (wikipedia.com)
Syn: insectology
Word origin: From French entomologie, from Ancient Greek ἔντομον , éntomon, insect + –logie (from Ancient Greek -λογία, -logía, “-logy”.