
• (n. pl.) Grooves or furrows formed in snow by the action of the wind, and running parallel with the direction of the wind. This formation results from the erosion of transverse waves previously formed.
Found on
http://thinkexist.com/dictionary/meaning/zastrugi/
Zas·tru'gi noun plural ; sing.
- ga . [ Russian
zastruga furrow made on the shore by water.] Grooves or furrows formed in snow by the action of the wind, and running parallel with the direction of the wind. This formation results from the erosion of transverse waves previously formed.
Found on
http://www.encyclo.co.uk/webster/Z/1

Also spelled sastrugi, this is a wind-sculpted snow formation with irregular grooves and/or ridges.
Found on
https://snowslang.com/glossary/
No exact match found.