Physician

A physician or medical doctor practices medicine osteopathy and in many states, chiropractic, and is concerned with maintaining or restoring human health through the study, diagnosis, and treatment of disease and injury. This is accomplished through a detailed knowledge of anatomy, physiology, diseases and treatment — the science of medicine — and its applied practice — the art or craft of medicine.

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• Doctors are men who prescribe medicines of which they know little, to cure diseases of which they know less, in human beings of whom they know nothing
  • Voltaire, French philosopher

• My doctor gave me six months to live, but when I couldn't pay the bill he gave me six months more.
  • Walter Matthau, actor