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aggregation of minute particles of water or ice suspended in the air. Formation of Clouds
Clouds are formed when air containing water vapor is cooled below a critical temperature called the dew point and the resulting moisture condenses into droplets on
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A grayish or bluish cloud sheet or layer of striated, fibrous, or uniform appearance; totally or partially covering the sky; and having parts thin enough to reveal the sun at least vaguely. Altostratus does not show halo phenomena. On weather charts, altostratus clouds are represented by the symbol.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved