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Show words looked up
Word |
# |
Date |
Definition |
Site |
Level |
| radon |
1 |
today |
a radioactive gas that is one of the chemical elements. It is found in small amounts in some soils and rocks. (symbol: Rn) |
Kids |
Ch. |
| caution |
1 |
today |
attentiveness and prudence; wariness. [5 definitions] |
Main |
Adv. |