Zastrugi \Zas*tru"gi\, n. pl.; sing. {-ga}. [Russ. 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.
[Webster 1913 Suppl.]