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| a wave in which the direction of displacement is perpendicular to the direction of propagation, as a surface wave of water |
| the meeting of particles or of bodies in which each exerts a force upon the other, causing the exchange of energy or momentum |
antineutron (ān'tē-n 'trŏn', ān'tī-) Pronunciation Key
The antiparticle that corresponds to the neutron. |
antineutron
antiparticle of the ordinary neutron, first produced in 1956 at the Bevatron particle accelerator at the University of California, Berkeley, by passing an antiproton beam through matter. Antineutrons were created when antiprotons in the beam exchanged their negative charge with nearby protons, which have a positive charge. The antineutrons were detected through their annihilation reactions with neutrons and protons.
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