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Definition 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.
Generic synonyms: El Nino
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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.