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reverse lightning

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A flash of light in the sky caused by an electrical discharge from the Earth's surface to a cloud. Reverse lightning is so called because lightning typically occurs between clouds or travels from a cloud to the Earth's surface. Also called return stroke See note at lightning.
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ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?
We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.
Question 1 of 8
Which of the following words describes “sky blue”?
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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