| extratropical cyclone (ěk'strə-trŏp'ĭ-kəl) Pronunciation Key
See under cyclone. |
extratropical cyclone
a type of storm system formed in middle or high latitudes, in regions of large horizontal temperature variations called frontal zones. Extratropical cyclones present a contrast to the more violent cyclones or hurricanes of the tropics, which form in regions of relatively uniform temperatures.
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