IPA: /ˌɛntəˈmɒlədʒɪkəl/
KK: /ˌɛntəˈmɒlədʒɪkəl/
Relating to the scientific study of insects.
The entomological research revealed new species of beetles in the rainforest.
Entomological → It is formed from "entomo-" (from Greek "entomon", meaning insect) and "-logical" (from Greek "logia", meaning study or science). The word "entomological" refers to the study or science of insects.
Think of 'insect' ('entomo-') and 'study' ('-logical') to remember that 'entomological' means the study of insects.