noun
orchestra member; musician (in an orchestra)
Refers specifically to a member of a musical ensemble such as an orchestra or band, not a solo musician.
彼はプロの楽団員として活躍している。
He is active as a professional orchestra member.
楽団員たちは毎日練習に
The orchestra members practice hard every day.
音楽家 is a broader term for 'musician', not limited to orchestra members.
Compound of 楽団 (orchestra) + 員 (member).