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particle beam

noun

  1. Physics. a concentrated stream of particles, as electrons, neutrons, or protons, generated for studying particle interactions, nuclear structure, crystal structure, etc.
  2. Military. a high-energy stream of such particles for use as a weapon or for antimissile defense.

particle beam

noun

  1. a stream of energized particles produced by a particle accelerator
  2. such a stream emitted by a particle beam weapon

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