cosmic ray
noun
: a stream of atomic nuclei of extremely penetrating character that enter the earth's atmosphere from outer space at speeds approaching that of light
Examples of cosmic ray in a Sentence
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The constant interactions between cosmic rays and CMB photons slows the cosmic ray, limiting their kinetic energy.
—
Keith Cooper, Space.com, 16 May 2025
The cosmic rays projected onto an Aries are restorative and therapeutic.
—Lisa Stardust, People.com, 14 Feb. 2025
There, the minerals were protected from incoming cosmic rays that would have otherwise changed their chemical makeup over time.
—Nell Greenfieldboyce, NPR, 27 May 2025
Radiation exposure results from galactic cosmic rays and solar particle events.
—Eileen Falkenberg-Hull, MSNBC Newsweek, 27 May 2025
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Keith Cooper, Space.com, 16 May 2025
The cosmic rays projected onto an Aries are restorative and therapeutic.
—Lisa Stardust, People.com, 14 Feb. 2025
There, the minerals were protected from incoming cosmic rays that would have otherwise changed their chemical makeup over time.
—Nell Greenfieldboyce, NPR, 27 May 2025
Radiation exposure results from galactic cosmic rays and solar particle events.
—Eileen Falkenberg-Hull, MSNBC Newsweek, 27 May 2025
See All Example Sentences for cosmic ray
Cite this Entry
“Cosmic ray.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cosmic%20ray. Accessed 17 Jun. 2025.
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