| Answer | Crossword Clue |
|---|---|
| uranias | URANIA, uranium dioxide |
| urania | uranium dioxide |
| uraninite | uranium dioxide, the major ore of uranium, found most frequently in botryoidal form as pitchblende |
| uraninites | URANINITE, uranium dioxide, the major ore of uranium, found most frequently in botryoidal form as pitchblende |
| uraninite | mineral, probably originally uranium dioxide, UO2, but altered by radioactive decay, and usually containing uranium trioxide, lead, radium, and helium, occurring in several varieties, including pitchblende: the most important ore of uranium |
