noun
Formal term for a medical doctor; used in official contexts, news, and professional titles. In casual conversation, 医者 (いしゃ) is more common.
彼は大学病院で医師として働いている。
He works as a doctor at a university hospital.
医師の診断によると、手術は必要ないそうだ
According to the doctor's diagnosis, surgery is not necessary.
Compound of 医 (medicine) and 師 (master, specialist). The spelling is conventional; the exact historical derivation is uncertain.