What is the meaning of nacreous cloud?

noun

  • A luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon.
WordNet 3.0 © 2006 by Princeton University
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APAWordNet. (2010). nacreous cloud. Retrieved September 20, 2026, from http://smartdefine.org/nacreous_cloud/definitions/1324357
ChicagoWordNet. 2010. "nacreous cloud" http://smartdefine.org/nacreous_cloud/definitions/1324357 (accessed September 20, 2026).
HarvardWordNet 2010, nacreous cloud, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/nacreous_cloud/definitions/1324357>.
MLAWordNet. "nacreous cloud" 23 October 2010. Web. 20 September 2026. <http://smartdefine.org/nacreous_cloud/definitions/1324357>