from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. brown silt that consists of airborne volcanic sediment or soot particles from artificial pollutants, and water from ablation of ice sheets
from The Century Dictionary and Cyclopedia
- n. The name given by Nordenskjöld to a gray powder noticed by him in various places in Greenland on the surface of the inland ice, at a great distance from earth or rock, and which he considered to be of cosmic (meteoric) origin.
Sorry, no etymologies found.