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extratropical cyclone

[ek-struh-trop-i-kuh l, ek-] /ˈɛk strəˈtrɒp ɪ kəl, ˌɛk-/
any large-scale, cyclonic storm that is not a tropical cyclone, especially the common frontal cyclone of the middle and high latitudes.
Origin of extratropical cyclone
First recorded in 1920-25; extra- + tropical Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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extratropical cyclone in Science
extratropical cyclone
See under cyclone.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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