verglas
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ver·glas
(vĕr-glä′)n.
A thin coating of ice, as on rock.
[French, from Old French verre-glaz : verre, glass (from Latin vitrum) + glas, glace, ice (from Vulgar Latin *glacia, from Latin glaciēs; see glacé).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
verglas
(ˈvɛəɡlɑː)n, pl -glases (-ɡlɑː; -ɡlɑːz)
(Physical Geography) a thin film of ice on rock
[from Old French verre-glaz glass-ice, from verre glass (from Latin vitrum) + glaz ice (from Late Latin glacia, from Latin glaciēs)]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014