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Definition of neutron noun from the Oxford Advanced American Dictionary

 

neutron

 noun
noun
NAmE//ˈnutrɑn//
 
(physics)
 
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a very small piece of matter (= a substance) that carries no electrical charge and that forms part of the nucleus (= central part) of an atom see also electron, proton
See the Oxford Advanced Learner's Dictionary entry: neutron

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