frostline

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frostline

(ˈfrɒstˌlaɪn)
n
1. (Geological Science) the deepest point in the ground to which frost will penetrate
2. (Geological Science) the limit towards the equator beyond which frosts do not occur
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

frost•line

(ˈfrɔstˌlaɪn, ˈfrɒst-)

n.
1. the maximum depth at which soil is frozen.
2. the lower limit of permafrost.
[1860–65, Amer.]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive
Sunday evening and Monday is expected to be slightly cooler, but the frostline will stay south of the continent with only a limited effect to the north.
Understanding weather not predicting
Summit's Frostline is a rye beer that does not stint on the rye.
Brew notes: American rye ales
How do you build sewer and sewage-treatment facilities that will freeze unless you put them well below frostline? How do you compost garbage?
Roblin City: a gleaming metropolis on Hudson Bay
By measuring the bubble soon after the frostline, the system can achieve proper bubble size without waiting for the film to pass through the top nip rollers.
More ... layers, output & quality
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