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Definition of La Niña
1. Proper noun. A sustained sea-surface temperature anomaly of magnitude greater than 0.5°C across the central tropical Pacific Ocean, associated with a negative anomaly and producing predictable variations in local and regional weather patterns. ¹
2. Proper noun. (nonstandard spelling of La Niña) ¹
3. Proper noun. (alternative spelling of La Niña) ¹
¹ Source: wiktionary.com