verglas

a thin coating of ice that forms on rocks overnight, or when snow melts and then refreezes.
Found on http://camposaur.com/camping-glossary/

verglas

a thin coating of ice that forms on rocks overnight, or when snow melts and then refreezes.
Found on https://www.mnn.com/earth-matters/wilderness-resources/stories/beginners-gl

Verglas

A Verglas is another typical feature that most trekkers would see, especially during the winter treks, but rarely identify. Thin, clear ice sheet formed due to the freezing of rain or melt water on a hard, smooth surface like rock or wood. A Verglas can be serious mountain hazard while trekking if you are moving early morning or post sunset. The su...
Found on https://www.bikatadventures.com/Home/Blog/10-Mountain-features-that-must-be

verglas

film of ice on rock
Found on http://phrontistery.info/v.html
No exact match found