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altostratus plural

al·to·stra·tus

The plural form of altostratus is altostrati

A a

Definitions

  • noun plural altostratus a cloud of a class characterized by a generally uniform gray sheet or layer, lighter in color than nimbostratus and darker than cirrostratus: of medium altitude, about 8000–20,000 feet (2450–6100 meters). 1
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