Definition of antiparticle in English:

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antiparticle

Pronunciation: /ˈan(t)ēˌpärdək(ə)l/ /ˈanˌtīˌpärdək(ə)l/

noun

Physics
A subatomic particle having the same mass as a given particle but opposite electric or magnetic properties. Every kind of subatomic particle has a corresponding antiparticle, e.g., the positron has the same mass as the electron but an equal and opposite charge.
Example sentences
  • Positively charged beta particles, the antiparticle of electrons, are called positrons.
  • Some neutral particles such as photons are their own antiparticles, while others like neutrons have antiparticles with opposite magnetic moments.
  • Note that subatomic particles sometimes have antiparticles, with opposite charge and spin, that are the same ones going backwards in time.
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