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auroral

 - 2 dictionary results

au⋅ro⋅ral

  [aw-rawr-uhl, aw-rohr-, uh-rawr-, uh-rohr-]
Use auroral in a Sentence
–adjective
1. of or like the dawn.
2. pertaining to the aurora borealis or aurora australis.
Origin:
1545–55; auror(a) + -al 1

Related forms:
au⋅ro⋅ral⋅ly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
Cite This Source Link To auroral
au·ro·ra   (ə-rôr'ə, ə-rōr'ə)   
n.   pl. au·ro·ras or au·ro·rae (ə-rôr'ē, ə-rōr'ē)

  1. A luminous atmospheric phenomenon appearing as streamers or bands of light sometimes visible in the night sky in northern or southern regions of the earth. It is thought to be caused by charged particles from the sun entering the earth's magnetic field and stimulating molecules in the atmosphere.

  2. The dawn.


[Middle English, dawn, from Latin aurōra; see aus- in Indo-European roots.]
au·ro'ral, au·ro're·an (-ē-ən) adj., au·ro'ral·ly adv.
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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