from The American Heritage® Dictionary of the English Language, 4th Edition
- n. An Arctic mound or conical hill, consisting of an outer layer of soil covering a core of solid ice.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A conical mound with an ice core (that is, a mound of earth-covered ice), particularly if lasting more than a year; caused by permafrost uplift.
Inuit pingu.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Greenlandic or Inuktitut pingu ("small hill"). (Wiktionary)