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1. (n.) Van Allen belt
either of two atmospheric regions of high-energy charged particles, one at an altitude of about 2000 mi. (3200 km) and the other at from 9000 to 12,000 mi. (14,500 to 19,000 km).
Etymology: (1955–60; after J. A. Van Allen (b. 1914), U.S. physicist)
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| Definition of 'van allen belt' |
Princeton's WordNet |
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1. (noun) Van Allen belt
a belt of charged particles (resulting from cosmic rays) above the Earth trapped by the Earth's magnetic field
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Definitions of van allen belt 
