Meaning of neutron

neu•tron

Pronunciation: (n'tron, ny'-), [key]
— n. Physics.
  1. an elementary particle having no charge, mass slightly greater than that of a proton, and spin of : a constituent of the nuclei of all atoms except those of hydrogen. Symbol: n
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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