| UR | a heavy toxic silvery-white radioactive metallic element |
|---|---|
| UR | a uranium isotope with mass number 235 |
| UR | the commonest isotope of uranium |
| UR | any ore from which uranium can be extracted |
| UR | a physicist who studies astronomy |
| UR | the branch of physics that studies celestial bodies and the universe as a whole |
| UR | surgical correction of a defect of the palate |
| UR | stargazers |
| UR | a giant planet with a ring of ice particles |
| UR | (Greek mythology) god of the heavens |
| UR | the bivalent radical UO2 which forms salts with acids |
| UR | the bivalent radical UO2 which forms salts with acids |