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antineutron Syllabification: an·ti·neu·tron
Pronunciation: /ˈan(t)ēˌn(y)o͞oträn/
/ˈanˌtīˌn(y)o͞oträn/

Definition of antineutron in English:

noun

Physics
The antiparticle of a neutron.
Example sentences
  • One can imagine atoms that are made of antiparticles: antiprotons, antineutrons, and positrons.
  • Antimatter is matter composed of antiparticles, such as positrons, antineutrons and antiprotons.
  • The antineutron, although neutral like the neutron, is distinguishable from the neutron because it is composed of two anti-down quarks and one anti-up quark.

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