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parhelic ring

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par·he·lic circle   (pär-hē'lĭk)   
n.  A luminous halo visible at the height of the sun and parallel to the horizon, caused by the sun's rays reflecting off atmospheric ice crystals. Also called parhelic ring.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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parhelic ring

noun
a luminous halo parallel to the horizon at the altitude of the sun; caused by ice crystals in the atmosphere [syn: solar halo
WordNet® 3.0, © 2006 by Princeton University.
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