Refers to the branch of physics dealing with motion and forces, or the engineering study of machines. Often used in academic or technical contexts.
彼は大学で機械学を専攻している。
He is majoring in mechanics at university.
To learn the basics of mechanics, knowledge of physics is necessary.
Compound of 機械 (machine) and 学 (study, -ology). The term is a straightforward Sino-Japanese formation for the academic discipline of mechanics.