elementary particle

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elementary particle (plural elementary particles)

  1. (physics) A fundamental particle; any of the subatomic particles that do not consist of other, smaller particles; the gauge bosons, leptons and quarks.
    • 2012 March 1, Jeremy Bernstein, “A Palette of Particles”, in American Scientist[1], volume 100, number 2, page 146:
      The physics of elementary particles in the 20th century was distinguished by the observation of particles whose existence had been predicted by theorists sometimes decades earlier.