frost line(redirected from Frostline)
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Related to Frostline: Freezing depth
frost line[′frȯst ‚līn]
The maximum depth of frozen ground during the winter.
The lower limit of the permafrost.
In polyethylene film extrusion, a ring-shaped area with a frosty appearance at the point where the film reaches its final diameter.
An imaginary line indicating the depth of frost penetration in the ground.