IPA: //mjuːˈzɪkəˌlɒdʒɪst//
KK: /ˈmjuːzɪkɒlədʒɪst/
A person who studies the history, theory, and practice of music.
The musicologist presented her research on the evolution of jazz music.
Musicologist → It is formed from "music" (from Greek "mousikē", meaning the art of the Muses) and "-ologist" (from Greek "-logos", meaning one who studies). A musicologist is someone who studies the art of music.
Think of someone who studies the art of the Muses — that's what a musicologist does.