aurora borealis

Cultural Dictionary
aurora borealis [(uh-rawr-uh bawr-ee-al-is)]

A display of colored lights in the sky, also called northern lights, caused by the interaction of particles from the sun with the upper atmosphere near the North Pole. A similar display, called the aurora australis, occurs in the atmosphere above the South Pole.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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