the GNU version of the Collaborative International Dictionary of English
Incorrect, but common, var. of zastrugi.
The Century Dictionary and Cyclopedia
A term current in Siberia for flutings or little ridges of wind-blown snow, running parallel with the direction of the air-currents, and now sometimes quoted in English. See zastruga.
Word Usage
"Driving vehicles over the sastrugi is pretty bad for tracks, towbars and tank runners."