nacreous cloud


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Related to nacreous cloud: Noctilucent cloud, Polar stratospheric cloud
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Synonyms for 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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References in periodicals archive ?
Meteorological officer Renae Baker captured spectacular images of the nacreous clouds, on July 25.
Meteorological officer Renae Baker captured spectacular images of the nacreous clouds, also known as polar stratospheric clouds, on July 25.
A few of her paintings have only clouds, but many feature colorful and unusual atmospheric sightings such as nacreous clouds, eclipses or rosy lightning.
and northern Europe, Veikko Makela of Helsinki, Finland, has communicated a little-known distinction between these rare, nacreous clouds and the noctilucent clouds more often seen at high latitudes (see the July 1994 issue, page 76).