- nouna luminous iridescent cloud at a high altitude that may be seen when the sun is a few degrees below the horizon• Syn: ↑mother-of-pearl cloud• Hypernyms: ↑cloud
* * *noun: a luminous iridescent cloud that occurs at altitudes of about 85,000 feet — called also mother-of-pearl cloud
* * *a rarely seen, luminous, iridescent cloud shaped like a cirrus or altocumulus, approximately 15 mi. (24 km) above the earth, and of unknown composition. Also called mother-of-pearl cloud.
* * *nacreous cloud,an iridescent cloud, resembling a cirrus, seen only in northern latitudes some 15 to 20 miles above the earth; mother-of-pearl cloud.
Useful english dictionary. 2012.
Look at other dictionaries:
nacreous cloud — a rarely seen, luminous, iridescent cloud shaped like a cirrus or altocumulus, approximately 15 mi. (24 km) above the earth, and of unknown composition. Also called mother of pearl cloud. * * * … Universalium
nacreous cloud — A highly layered cloud with an iri descent appearance. It is akin to high altitude cirrus clouds. Also called a mother of pearl cloud. Clouds of unknown composition, whose form resembles that of cirrus or altocumulus lenticularis. These clouds… … Aviation dictionary
nacreous cloud — noun polar stratospheric cloud … Wiktionary
nacreous cloud — /neɪkriəs ˈklaʊd/ (say naykreeuhs klown) noun cirrus cloud which is lit by the sun when it is several degrees below the horizon, resulting in an iridescent colouring … Australian English dictionary
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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 • Syn: ↑nacreous cloud • Hypernyms: ↑cloud * * * noun : nacreous cloud * * * mother of pearl cloud, = nacreous cloud. (Cf … Useful english dictionary
polar stratospheric cloud — noun A relatively rare type of clouds that occurs high in the stratosphere; polar stratospheric clouds often resemble mother of pearl as they shine in vivid colours, known as irisation Syn: mother of pearl cloud, nacreous cloud … Wiktionary
mother-of-pearl cloud. — See nacreous cloud. [1930 35] * * * … Universalium