Definition of Ferrel's law in US English:

Ferrel's law


  • 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.

    • ‘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.


Ferrel's law

/ˈferəlz ˌlô/