Iceblink is a white glare on the underside of low clouds, reflected up from ice on the horizon.
This phenomenon has been used by Inuit hunters to navigate since time immemorial. We westerners picked it up from them in the nineteenth century.
Away from the Poles and the Inuit, icebling is more popular, tangible, and navigable. Kim Kardashian in Paris, that sort of thing.
BEMUSED BY THE VARIETY OF VOCABULARY?
PETER THE PROOFER CAN FIX THAT!