| Answer | Crossword Clue |
|---|---|
| di | didymium |
| didymiums | DIDYMIUM, a mixture of rare earth elements |
| praseodymium | a chemical element, a metal with green salts, isolated from the once-supposed element didymium |
| praseodymiums | PRASEODYMIUM, a chemical element, a metal with green salts, isolated from the once-supposed element didymium |
