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mesocyclone

American  
[mez-uh-sahy-klohn, mes-, mee-zuh-, -suh-] / ˌmɛz əˈsaɪ kloʊn, ˌmɛs-, ˌmi zə-, -sə- /

noun

Meteorology.
  1. a small cyclone that arises near a thunderstorm and is sometimes associated with the occurrence of tornadoes.


Etymology

Origin of mesocyclone

First recorded in 1970–75; meso- + cyclone

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

Precipitation in the storm cloud pushes the mesocyclone down, and as parts of it are pressurized and exposed to different temperatures, a funnel is created.

From New York Times Mar. 10, 2023

The mighty mesocyclone that was responsible for both tornadoes was embedded within a line of storms that passed the region.

From Washington Post Dec. 28, 2021

Brewing within the storm is a draft with the right rotation, size, depth and duration for Doppler radar to label it as a mesocyclone: the precursor to a tornado.

From Scientific American Aug. 3, 2021

Shearing winds tilt the top of the surviving vortex, causing cool rain to fall away from the warm surface air fueling the newly born mesocyclone, letting the supercell purr like a finely tuned engine.

From National Geographic Dec. 28, 2015

By A mesocyclone tornado, a violently rotating column of air that descends from a thunderstorm.

From Slate Apr. 2, 2012

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