Definition of Ferrel's law in English:

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Ferrel's law

Pronunciation: /ˈferəlz ˌlô/
A law stating that Coriolis forces deflect winds and freely moving objects to the right in the northern hemisphere and to the left in the southern hemisphere.
Example sentences
  • In the northern hemisphere, the wind direction of the anticyclone follows Ferrel's law but not the direction for the cyclone (reverse).
  • The Coriolis effect becomes Ferrel's law when geographers describe the mindless motion of liquids flowing across a rotating spherical body.


Early 20th century: named after William Ferrel (1817–91), American meteorologist.

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