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Definition |
Site |
Level |
fluorine |
1 |
today |
a substance that is a chemical element. Fluorine combines easily with other elements to form compounds. Some of these compounds are used to prevent tooth decay. Fluorine is poisonous in its pure gas form. (symbol: F) |
Main |
Int. |
fly off the handle |
1 |
today |
to become very angry; lose one's temper (an informal use). |
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Int. |