noun
or zas·tru·ga ˈs]astrəgə, ˈz], ]äs-, -ˌgä; ̷ ̷ˈstrügə
( plural sastru·gi or zastru·gi -(ˌ)gē\)
Etymology: Russian zastruga groove
: a wavelike ridge of hard snow usually formed on a level surface by the wind parallel to its direction and occurring in great numbers in the snowfields of the arctic and antarctic regions — usually used in plural
the crisscrossing and fan-tailed form of the sastrugi — R.E.Byrd