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aurora borealis
au·ro·ra bo·re·al·is [ aw ràwrə bawree álliss ]


noun 
Definition:
 
colored lights in northern skies: the colored lights seen in the skies around the North Pole
[< modern Latin, "northern aurora"]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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