Definitions for nacreous cloud
This page provides all possible meanings and translations of the word nacreous cloud
nacreous cloud, mother-of-pearl cloud(noun)
a luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon
polar stratospheric cloud
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"nacreous cloud." Definitions.net. STANDS4 LLC, 2015. Web. 3 Sep. 2015. <http://www.definitions.net/definition/nacreous cloud>.