ˈferəlz- noun
Usage: usually capitalized F
Etymology: after William Ferrel died 1891 American meteorologist, its formulator
: a statement in meteorology: a wind in any direction tends to deflect to the right in the northern hemisphere and to the left in the southern with a force that is directly proportional to the mass of wind in question, its velocity, the sine of the latitude, and the angular velocity of the earth's rotation