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plu·to·ni·um
plutonium
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- pronunciation:
- plu
to
ni
m
- features:
- Word Combinations (noun), Word Explorer
part of speech: |
noun |
definition: |
a radioactive chemical element of the actinide series that has ninety-four protons in each nucleus and that is capable of explosive nuclear fission in a chain reaction, used as fuel in some types of nuclear reactors. (symbol: Pu)
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