from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A layered mass of
iceformed in temperatures below 0ºC., from the freezing of successive flows of ground water over the previously formed layers of ice.
Sorry, no etymologies found.
Icings (also known as aufeis or naleds) are comprised of groundwater that freezes when it reaches the streambed during winter.
I watched the plane's shadow glide across Fin Creek and the Ivishak, Kavik, and Echooka Rivers, the last one a braided plain of gravel choked with a frozen skim of aufeis.