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ra·di·o·ac·tiv·i·ty
 radioactivity
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- pronunciation:
- reI
di
o
aek
tI
vih
ti
- features:
- Word Combinations (noun), Word Explorer
| part of speech: |
noun |
| definition: |
the giving off of energy as a result of the decay of unstable atoms.
Uranium has a high level of radioactivity. |
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