Definition from Wiktionary, the free dictionary
- A smooth, barely visible, and dangerously slippery film of ice, usually over a dark surface, such as rock or pavement.
1965, December 25, Oregon Bus Crash Kills 12, Hurts 27, page 30:
- He said the bus struck a patch of black ice, or freshly formed ice as yet invisible on the road surface, just after he had passed a trailer truck.
invisible film of ice