Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A cooling of the ocean surface off the western coast of South America, occurring periodically every 4 to 12 years and affecting Pacific and other weather patterns.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • 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.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[American Spanish, the girl (to distinguish it from El Niño) : Spanish la, the (from Latin illa, feminine of ille; see al- in Indo-European roots) + niña, daughter (from Old Spanish ninna, from Vulgar Latin *nīnna).]

Examples

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