Definition of nuclear fusion
physics
:a process in which the nuclei of atoms are joined
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nuclear fusion
noun
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nuclear
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: of, relating to, or constituting a nucleus
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: of or relating to the atomic nucleus
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: used in or produced by a nuclear (see nuclear 2) reaction (such as fission)
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fusion
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: the act or process of liquefying or rendering plastic by heat
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: a union by or as if by melting: such as
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: a merging of diverse, distinct, or separate elements into a unified whole
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