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 Definitions of cosmic ray  [ˈkɒz mɪk]  

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Definition of 'cosmic ray' Random House Webster's College Dictionary 

1. (n.) cosmic ray
a radiation of high penetrating power originating in outer space and consisting partly of high-energy atomic nuclei.
Definition of 'cosmic ray' Princeton's WordNet 

1. (noun) 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

'cosmic ray' - Nearby Entries  

cosmic microwave background  cosmic microwave background radiation  cosmic radiation  cosmic ray  cosmic time  cosmocampus  cosmocampus profundus  



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