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clouds 
Fine droplets of water or ice crystal suspended in the atmosphere; the World Meteorological Organization classifies them according to 10 types.
high clouds
Clouds at an altitude higher than 6,000 meters and composed of ice crystals; these clouds do not generate precipitation.
cirrus
Cloud in the form of wisps or separate strips; it usually appears in advance of a depression.
cirrocumulus
Cloud formed of white or gray flecks or strips, often arranged in rows.
cirrostratus
Whitish layer that can completely cover the sky and that creates a halo around the Sun.
