Black Ice Definition

noun
A thin, nearly invisible coating of ice that forms on paved surfaces.
American Heritage
A thin, nearly invisible layer of ice on a paved road.
Webster's New World

A smooth, barely visible, and dangerously slippery film of ice, usually over a dark surface, such as rock or pavement.

Wiktionary
Attributive form of black ice.
Black-ice patches.
Wiktionary