The Full Form of JAMA is‍ Journal of the American Medical Association.

JAMA: The Journal of the American Medical Association is a peer-reviewed medical journal published 48 times a year by the American Medical Association. It publishes original research, reviews, and editorials covering all aspects of biomedicine. 

uilding on the editorial excellence of JAMA®, the Journal of the American Medical Association, JAMA Network Open™ and the 10 JAMA Network™ specialty journals offer enhanced access to the research, reviews and perspectives shaping medicine today and into the future. Through a variety of innovative tools, the JAMA Network™ provides the insights that matter most to medical research and practice.