| lake powell | (n) the second largest reservoir in the United States; located in southern Utah and north central Arizona and formed by the Glen Canyon Dam on the Colorado River |
| powell | (n) 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), Syn. Colin Powell, Colin luther Powell |
| powell | (n) English physicist who discovered the pion (the first known meson) which is a subatomic particle involved in holding the nucleus together (1903-1969), Syn. Cecil Frank Powell |
| hubble | (n) United States astronomer who discovered that (as the universe expands) the speed with which nebulae recede increases with their distance from the observer (1889-1953), Syn. Edwin Hubble, Edwin Powell Hubble |
