cosmic ray
English
Noun
cosmic ray (plural cosmic rays)
- (astronomy) An energetic particle originating outside our solar system.
- (astronomy) Cosmic radiation: a stream of cosmic rays.
Usage notes
The use of the words "ray" and "radiation" implies incorrectly that cosmic rays are electromagnetic waves, similar to light rays and X-rays; cosmic rays were so named before their nature was known.
Hypernyms
Hyponyms
- anomalous cosmic ray
Translations
energetic particle
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cosmic radiation
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References
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