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radiation belt

noun, Physics.
Origin of radiation belt
1955-60 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for radiation-belt

radiation belt

a region in the magnetosphere of a planet in which charged particles are trapped by the planet's magnetic field, an example being the earth's Van Allen belts
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Contemporary definitions for radiation-belt

a region around a planet where charged particles accumulate due to the planet's magnetic field

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astronomy's 21st Century Lexicon
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