North Atlantic Oscillation

noun

Definition of North Atlantic Oscillation

climatology
:a periodic seesaw fluctuation in sea-level atmospheric pressures over the northern Atlantic Ocean that is believed to contribute to the Arctic Oscillation — compare arctic oscillation, southern oscillation

First Known Use of north atlantic oscillation

1924


North Atlantic Treaty Organization

geographical name

Definition of North Atlantic Treaty Organization

military alliance established in 1949 with the purpose of promoting the collective security of the member nations (now Albania, Belgium, Bulgaria, Canada, Croatia, the Czech Republic, Denmark, Estonia, France, Germany, Greece, Hungary, Iceland, Italy, Latvia, Lithuania, Luxembourg, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Turkey, the United Kingdom, and the United States)

North Atlantic right whale

noun
variants: or less commonly northern Atlantic right whale

Definition of North Atlantic right whale

:a chiefly black right whale (Eubalaena glacialis) of temperate and subpolar waters of the Atlantic Ocean
  • The North Atlantic right whale is an endangered species, reduced by decades of hunting to just 350 worldwide.
  • —Michael LevensonBoston Sunday Globe1 May 2005

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First Known Use of north atlantic right whale

1962


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