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.
Just about half, 48 percent, said the best age for a president was the 50s, even though neither of the presumptive nominees is in his fifties (nor is Hillary Clinton). Barack Obama is 46, and just 20 percent of registered voters said the 40s was the right age for a president. But far fewer - only 2 percent -- thought McCain's decade (70's) was the best for the job.