Master medical and health knowledge, collectively referred to engage in disease prevention and treatment professionals. Doctors, ancient, said a doctor or herbalist. The doctor, "the term is also commonly used in the northerners. In European and American doctors commonly referred to as "Physician", only the surgeon to be called as "Surgeon". Since after the Middle Ages is generally accepted that "within science" = "Medical" = "physician" = "Doctor Physician. The surgeon's work is a beauty and barber, and only exist as a Medicaid work, but with the advance of the times, surgeons and pharmacists are beginning to own for treatment, they also become to be seen as a doctor. French surgeon called for: decin (medusan), German: Arzt (arutsuto). However, the Commonwealth British surgeon, also called to the "secret Secretary off.