preceptor; supervising physician; attending physician
Medical term for a senior doctor who supervises and trains residents or medical students in a clinical setting.
The resident provides medical care under the supervision of the preceptor.
The supervising physician taught the young doctor the surgical procedure.
主治医 is the attending physician in charge of a patient's care, not necessarily a supervisor of other doctors.
Compound of 指導 (しどう, 'guidance, supervision') and 医 (い, 'doctor').