airglow Hear it!

airglow definition

air·glow (-glō′)

noun

the steady, faint glow, usually seen in the night sky, caused by molecules and atoms in the upper atmosphere that slowly release photochemical energy: visible only over middle and low latitudes

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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