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 oldest president to assume office is Donald Trump, who was 7009222804000000000â 70 years, 220 days old when he assumed office. Ronald Reagan was the oldest in office, at the age of 7009246008880000000â 77 years, 349 days when he left office. The oldest living former president is George H. W. Bush, born June 12, 1924 (aged 7009292956480000000â 92 years, 304 days). Jimmy Carter is the second-oldest, 111 days younger than Bush. Carter was born October 1, 1924 (aged 7009291997440000000â 92 years, 193 days).