El Nino southern oscillation

Definitions of El Nino southern oscillation
  1. noun
    a more intense El Nino that occurs every few years when the welling up of cold nutrient-rich water does not occur; kills plankton and fish and affects weather patterns
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    type of:
    El Nino, El Niño
    (oceanography) a warm ocean current that flows along the equator from the date line and south off the coast of Ecuador at Christmas time
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