cosmic ray definition

  • noun:
    • A stream of ionizing radiation of extraterrestrial source, consisting mainly of protons, alpha particles, alongside atomic nuclei but including some high-energy electrons, that comes into the atmosphere, collides with atomic nuclei, and produces additional radiation, principally pions, muons, electrons, and gamma rays.
    • a dynamic particle originating outside our solar power system.
    • Cosmic radiation: a stream of cosmic rays.
    • highly penetrating ionizing radiation of extraterrestrial source; consisting chiefly of protons and alpha particles; collision with atmospheric particles leads to rays and particles of several kinds
    • A stream of ionizing radiation of extraterrestrial source, consisting mainly of protons, alpha particles, and other atomic nuclei but including some high-energy electrons, that gets in the environment, collides with atomic nuclei, and creates secondary radiation, principally pions, muons, electrons, and gamma rays.
    • a dynamic particle originating outside our solar power system.
    • Cosmic radiation: a stream of cosmic rays.
    • extremely acute ionizing radiation of extraterrestrial beginning; consisting mainly of protons and alpha particles; collision with atmospheric particles results in rays and particles of several kinds

Related Sources

  • Hypernym for "cosmic ray"
  • Astronomy Dictionary for "cosmic ray"
    • atomic nuclei (mainly protons) being seen…
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