BLACK ICE

thin sheet of ice covering a road (hard to see, creates dangerous driving conditions)

Black ice is ice that lies upon a road and is transparent. The black colour is the asphalt of the roadway beneath the ice. Black ice is a significant traffic hazard where it occurs.
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Noun
1. a thin coating of ice (as from freezing mist) on a road or sidewalk; nearly invisible but very hazardous
(hypernym) ice, water ice

black ice
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