Urdu Meanings, Pronounciation and Synonyms:
cosmic ray
(Pronunciation -تلفظ سنیۓ )
US: 
Slow
Normal
Noun: cosmic ray
| 1. cosmic ray | |
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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
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