| / English Dictionary |
COSMIC RAY
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
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
Classified under:
Nouns denoting natural phenomena
Hypernyms ("cosmic ray" is a kind of...):
ionizing radiation (high-energy radiation capable of producing ionization in substances through which it passes)
Holonyms ("cosmic ray" is a part of...):
cosmic radiation (radiation coming from outside the solar system)
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