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Definition of neutron noun from the Oxford Advanced Learner's Dictionary

neutron

noun
 
/ˈnjuːtrɒn/
 
/ˈnuːtrɑːn/
(physics)
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  1. a very small piece of matter (= a substance) that carries no electric charge and that forms part of the nucleus (= central part) of an atom see also electron, protonTopics Physics and chemistryc2
    Oxford Collocations DictionaryNeutron is used before these nouns:
    • bomb
    See full entry
    Word Originearly 20th cent.: from neutral + -on.
See neutron in the Oxford Advanced American DictionarySee neutron in the Oxford Learner's Dictionary of Academic English

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