Definition of neutron
: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
From the M-W Editors
Origin and Etymology of neutron
probably from neutral
First Known Use: 1921
NEUTRON Defined for English Language Learners
neutron
playDefinition of neutron for English Language Learners
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physics : a very small particle of matter that has no electrical charge and is part of the nucleus of all atoms except hydrogen atoms
NEUTRON Defined for Kids
neutron
playDefinition of neutron for Students
: a particle that has a mass nearly equal to that of the proton but no electrical charge and that is present in all atomic nuclei except those of hydrogen
Medical Dictionary
neutron
playMedical Definition of neutron
: an uncharged elementary particle that has a mass nearly equal to that of the proton and is present in all known atomic nuclei except the hydrogen nucleus
Learn More about neutron
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See words that rhyme with neutron Spanish Central: Translation of neutron Nglish: Translation of neutron for Spanish speakers Britannica.com: Encyclopedia article about neutron
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