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cosmic ray
 
Noun cosmic ray has 1 sense
  1. cosmic ray - highly penetrating ionizing radiation of extraterrestrial origin; consisting chiefly of protons and alpha particles; collision with atmospheric particles results in rays and particles of many kinds
    --1 is a kind of     ionizing radiation
    --1 is a part of cosmic radiation
cosmetology cosmic cosmic background radiation cosmic dust cosmic joke cosmic microwave background cosmic microwave background radiation cosmic radiation cosmic ray cosmic time cosmics cosmism cosmo cosmo last cosmocampus cosmocampus profundus cosmocracy

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