| The American Heritage® Dictionary of the English Language: Fourth Edition. 2000. |
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| aurora borealis |
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| SYLLABICATION: | aurora bo·re·al·is |
| PRONUNCIATION: | bôr - l s, b r - |
| NOUN: | Inflected forms: pl. aurora bo·re·al·is·es (- -s z) or aurorae borealis An aurora that occurs in northern regions of the earth. Also called northern lights. | | ETYMOLOGY: | New Latin aur ra bore lis : Latin aur ra, dawn + Latin bore lis, northern.
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| The American Heritage® Dictionary of the English Language, Fourth Edition. Copyright © 2000 by Houghton Mifflin Company. Published by the Houghton Mifflin Company. All rights reserved. |
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