1.Definition: English physicist who discovered the pion (the first known meson) which is a subatomic particle involved in holding the nucleus together (1903-1969)

Related Noun(s):cecil frank powell

Category: People

2.Definition: United States general who was the first African American to serve as chief of staff; later served as Secretary of State under President George W. Bush (born 1937)

Related Noun(s):colin luther powell, colin powell

Category: People