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auroral

[aw-rawr-uh l, aw-rohr-, uh-rawr-, uh-rohr-] /ɔˈrɔr əl, ɔˈroʊr-, əˈrɔr-, əˈroʊr-/
adjective
1.
of or like the dawn.
2.
pertaining to the aurora borealis or aurora australis.
Origin
1545-1555
1545-55; auror(a) + -al1
Related forms
aurorally, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Examples from the web for auroral
  • Nearly circular bands, called auroral ovals, surround both poles of our planet.
  • In addition, the pattern of energy distribution matched the distribution of auroral activity.
  • The auroral display appears blue because of the glow of ultraviolet light.
  • Although rare, auroral sound seems to be a real phenomenon.
  • Already there have been reports that ghostly auroral glows can be glimpsed right through thick decks of clouds.
  • The technical details of auroral activity aren't quite as poetic.
  • But a large part of the energy that does reach the planet is converted by the auroral generator into electricity, and lots of it.
  • Usually aurorae form a ring pattern, but you can see patches of auroral emission inside the main ring, which is unexpected.
  • Plasma discharges from the object are may be linked to auroral displays, as well as power grid and radio blackouts.
  • There's already been some pretty nifty auroral activity.
Word Origin and History for auroral
adj.

1550s, "pertaining to dawn," from aurora + -al (1). Meaning "of the color of dawn" is from 1827; "of the aurora" from 1828.

Online Etymology Dictionary, © 2010 Douglas Harper
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