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extratropical cyclone

[ek-struh-trop-i-kuh l, ek-]

noun

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

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

extratropical cyclone in Science

extratropical cyclone

[ĕk′strə-trŏp′ĭ-kəl]

See under cyclone.

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.