Nacreous Cloud Definition
nākrē-əs
noun
A stratospheric cloud resembling a cirrus, showing iridescent coloration when the sun is several degrees below the horizon.
American Heritage
Synonyms:
- mother-of-pearl-cloud
Other Word Forms of Nacreous Cloud
Noun
Singular:
nacreous cloud
Plural:
nacreous cloudsOrigin of Nacreous Cloud
From nacre (from the iridescent coloring of mother-of-pearl)
From American Heritage Dictionary of the English Language, 5th Edition
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