Altostratus meaning

ăl'tō-străt'əs, -strā'təs
The type of gray or bluish cloud found at intermediate altitudes and consisting of a thick, dense, extensive layer of ice crystals and water droplets: may cause light precipitation.
noun
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A mid-altitude cloud that extends in flat, smooth sheets or layers of varying thickness. Altostratus clouds generally form between 2,000 and 6,100 m (6,560 and 20,000 ft) and often produce long, steady rain showers.
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(physics, meteorology). A principal medium-level cloud type in the form of a gray or bluish (never white) sheet or layer of striated, fibrous, or uniform appearance.
noun
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An extended cloud formation of bluish or gray sheets or layers.
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Origin of altostratus

  • Latin altus high al-2 in Indo-European roots stratus
    From American Heritage Dictionary of the English Language, 5th Edition