3 definitions found From WordNet (r) 2.0 [wn]: neutron n : an elementary particle with 0 charge and mass about equal to a proton; enters into the structure of the atomic nucleus From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]: 32 Moby Thesaurus words for "neutron": K-meson, Kern, NMR, alpha particle, antibaryon, antilepton, antimeson, atomic nucleus, atomic particle, baryon, beta particle, electron, elementary particle, graviton, lepton, meson, mesotron, nuclear force, nuclear magnetic resonance, nuclear particle, nuclear resonance, nucleon, nucleosynthesis, nucleus, photon, pion, proton, quark, strangeness, strong interaction, triton, valence electron From Elements database 20001107 [elements]: neutron Weight: 1.6749286*10^-27kg A neutral hadron that is stable in the atomic nucleus but decays into a protron, an electron and an antineutrino with a mean life of 12 minutes outside the nucleus. Neutrons exist in all atomic nuclei except normal hydrogen. Reported in 1932 by James Chadwick.
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