from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. A thin, nearly invisible coating of ice that forms on paved surfaces.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An invisible film of ice over dark surfaces, such as pavement or water, that makes them dangerously slippery.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. a thin coating of ice (as from freezing mist) on a road or sidewalk; nearly invisible but very hazardous


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  • Black ice, also known as "glare ice" or "clear ice," typically refers to a thin coating of glazed ice on a surface, often a roadway. Black ice is ice frozen without many air bubbles trapped inside, making it transparent. Black ice takes the color of the material it lies on top of, often wet asphalt or a darkened pond. Its difficult-to-detect nature makes it a significant hazard to drivers, pedestrians, and sailors.


    February 2, 2008