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Definition of nuclear fuel noun from the Oxford Advanced Learner's Dictionary

nuclear fuel

noun
 
/ˌnjuːkliə ˈfjuːəl/
 
/ˌnuːkliər ˈfjuːəl/
[uncountable]
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  1. a substance that can be used as a source of nuclear energy because it is capable of nuclear fission
See nuclear fuel in the Oxford Advanced American Dictionary
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