sastruga
noun
sas·tru·ga
ˈsa-strə-gə
ˈsä-;
ˌsa-ˈstrü-gə,
ˌsä-
plural sastrugi
ˈsa-strə-(ˌ)gē
ˈsä-;
ˌsa-ˈstrü-(ˌ)gē,
ˌsä-
: a wavelike ridge of hard snow formed by the wind
—usually used in plural
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Merriam-Webster unabridged
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