IPA: /kəˈliːəpəˌrɪst/
KK: /kəˈliːəpəˌrɪst/
A person who studies or specializes in beetles, which are a type of insect.
The coleopterist spent hours observing the different species of beetles in the forest.
Coleopterist → It is formed from "coleo-" (from Greek "koleos", meaning sheath) and "pteron" (meaning wing). A coleopterist is someone who studies beetles, which have a characteristic sheath-like covering over their wings.
Think of 'sheath' ('coleo-') covering 'wings' ('pteron') — that's why a coleopterist studies beetles, which have wings covered by a sheath.