osÂ·teÂ·opÂ·aÂ·thy. n. 1. A system of medicine practiced by licensed osteopathic physicians that involves palpation and noninvasive manipulation of the musculoskeletal system in the diagnosis and treatment of physical dysfunction, in conjunction with other medical, surgical, pharmacological, and therapeutic procedures.
Average Age of Presidents. The majority of the presidents were between the ages of 50 and 59 when they were elected into office. The youngest elected president was John F. Kennedy at age 43. The oldest elected president was Ronald Reagan at age 69.
The 45th and current President of the United States is Donald J. Trump. He was sworn in on January 20, 2017. Requirements to Hold Office. According to Article II of the U.S. Constitution, the President must be a natural-born citizen of the United States, be at least 35 years old, and have been a resident of the United States for 14 years.