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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 emission or amount of emission of energy or subatomic particles by the nuclei of certain unstable isotopes of elements as they decay.
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