medical doctor

Doctor of Medicine (M.D. or MD, from the Latin Medicinae Doctor meaning "Teacher of Medicine,") is an academic degree for medical doctors. It varies between countries, from being a first professional degree (medical diploma), to being a relatively rare higher doctoral academic research degree.
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The word physician applies to a person who practices some type of medicine. Such medical practitioners are concerned with maintaining or restoring human health through the study, diagnosis and treatment of disease and injury, through both an area of knowledge — a  science — of  body systems, their diseases and treatment, and the applied practice — an  art or craft — of that knowledge.
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