Associação Médica Brasileira (Brazilian Medical Association, in Portuguese language) is the national class association of physicians in Brazil. With more than 140,000 associates, is the second largest in the Americas, just after the American Medical Association. Physician examining a child A physician is a person who practices medicine. ... World map showing the Americas America or the Americas are the lands of the Western hemisphere consisting of the continents of North America and South America with their associated islands and regions. ... The American Medical Association (AMA) is the largest association of medical doctors in the United States. ...