anesthesiologist; anaesthetist
A medical doctor specializing in anesthesia and perioperative care.
Before the surgery, the anesthesiologist explained the anesthesia to me.
Refers to anesthesia itself, not the doctor.
Surgeon; performs operations, while an anesthesiologist manages anesthesia and patient stability.
Compound of 麻酔 (masui, 'anesthesia') + 科 (ka, 'department') + 医 (i, 'doctor').