Medicine:

Is the science and practice of establishing the diagnosis, prognosis, treatment and prevention of disease.

Medicine encompasses a variety of health care practices evolved to maintain and restore health by the prevention and treatment of illness. 

Contemporary medicine applies biomedical sciences, biomedical research, genetics, and medical technology to diagnose, treat, and prevent injury and diaseas, typically through pharmaceuticals or surgery, but also through therapies as diverse as pyschotherapy, external splints and traction, medical devices, biologics and ionizing radiation, amongst others.