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sastruga (plural sastrugi)
- Any of a series of long, wavelike ridges or grooves formed on a snow surface by the wind, especially in polar plains, and surfaces of ice covered lakes/seas. These dunes of snow may be blown across the plains like wind-driven waves.
- The Heart of the Antarctic: The Story of the British Antarctic Expedition 1907 -1909 by Sir Ernest Shackleton (Collins) →ISBN