permafrost

Definitions

General Science

  • noun ground that is permanently frozen, as in the Arctic regions

Astronomy

  • Permanent freezing of ground on Earth, found in the Arctic and Antarctic regions, sometimes to depths of many hundreds of metres. Permafrost has also been postulated as the cause of the patterned ground seen on the surface of Mars.

Construction

  • Permanently frozen soil or subsoil found in arctic or subarctic regions.
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