A neutron is an atomic particle that has no electrical charge.
Each atomic cluster is made up of neutrons and protons.
neutron in British English
(ˈnjuːtrɒn)
noun
physics
a neutral elementary particle with a rest mass of 1.674 92716 × 10–27 kilogram and spin 1⁄2; classified as a baryon. In the nucleus of an atom it is stable, but when free it decays
Word origin
C20: from neutral, on the model of electron
neutron in American English
(ˈnuˌtrɑn; ˈnjutrɑn)
noun
Particle Physics
an uncharged nucleon having a mass of c. 1.675×10-27 kg (c. 939.5729 MeV/c2, c. 1,839 times the mass of an electron): a free neutron, as in nuclear fission, has a half-life of c. 14.8 minutes, is readily absorbed by a nucleus, and decays into a proton, an electron, and a neutrino
Word origin
neutral + -on
Examples of 'neutron' in a sentence
neutron
Then the fission neutrons may travel right through it and escape from it before they happen to hit another nucleus.
Fisher, David E. Fire and Ice - the Greenhouse Effect, Ozone Depletion, and Nuclear Winter (1990)
The fusion reaction triggered by the lasers within the tiny pellet of deuterium and tritium emits trillions of stray neutrons.
Times, Sunday Times (2014)
In other languages
neutron
British English: neutron NOUN
A neutron is an atomic particle that has no electrical charge.
Each atomic cluster is made up of neutrons and protons.