NOUN | object | mother-of-pearl cloud, nacreous cloud | a luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon |
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Meaning | A luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon. | |
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Synonym | nacreous cloud | |
Broader | cloud | A visible mass of water or ice particles suspended at a considerable altitude |
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