permafrost(redirected from Permafrost soil)
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Permanently frozen subsoil, occurring throughout the Polar Regions and locally in perennially frigid areas.
(Physical Geography) ground that is permanently frozen, often to great depths, the surface sometimes thawing in the summer
[C20: from perma(nent) + frost]
per•ma•frost(ˈpɜr məˌfrɔst, -ˌfrɒst)
(in arctic or subarctic regions) permanently frozen subsoil.
[1943; perma (nent) frost]
A layer of permanently frozen subsoil, reaching depths up to 5,000 feet (1,524 meters). Permafrost is found throughout most of the polar regions.
Permanently frozen subsoil.
Permanently frozen ground found in polar and subpolar zones.