frost line

(redirected from Frostline)
Also found in: Dictionary, Financial, Wikipedia.
Related to Frostline: Freezing depth

frost line

[′frȯst ‚līn]
(geology)
The maximum depth of frozen ground during the winter.
The lower limit of the permafrost.
(materials)
In polyethylene film extrusion, a ring-shaped area with a frosty appearance at the point where the film reaches its final diameter.

frost line

An imaginary line indicating the depth of frost penetration in the ground.
References in periodicals archive ?
Old pieces of metal pipe, rebar and smaller angle iron was inserted into the cavities of the blocks and rammed well below the frostline.
Below the frostline, the temperature of the working surface was uniform and stable near -190 [degrees] C.
Liquid level is measured from the frostline, which forms after the probe is removed from the vessel.