from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A long wavelike ridge of snow, formed by the wind and found on the polar plains.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Any of a series of long, wavelike ridges or grooves formed on a snow surface by the wind, especially in polar plains.
Russian dialectal zastruga : za, beyond + struga, deep place into which one may fall; see sreu- in Indo-European roots.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Russian заструга (zastruga) (Wiktionary)