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natural radiation |
Also found in: Wikipedia, Hutchinson | 0.09 sec. |
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natural radiation, radioactivity that emanates from the soil, groundwater, or cosmic sources. Cosmic radiation includes actinic radiation from the sun and neutrinos from beyond the solar system. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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