Sastrugi

Sastrugi, or zastrugi, are sharp irregular grooves or ridges formed on a snow surface by wind erosion, saltation of snow particles, and deposition, and found in polar and temperate snow regions. They differ from sand dunes in that the ridges are markedly parallel to the prevailing winds. Smaller irregularities of this type are known as ripples (sm...
Found on http://en.wikipedia.org/wiki/Sastrugi

Sastrugi

• Incorrect, but common, var. of Zastrugi.
Found on http://thinkexist.com/dictionary/meaning/sastrugi/

sastrugi

(from the article `glacier`) ...wind, or very hard packed and rough when high winds occur during or after snowfall. Two features are prominent: snow dunes are depositional ...
Found on http://www.britannica.com/eb/a-z/s/33

Sastrugi

Sas·tru'gi Incorrect, but common, var. of Zastrugi .
Found on http://www.encyclo.co.uk/webster/S/18
No exact match found