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snow line

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noun

the line, as on mountains, above which there is perpetual snow.
the latitudinal line marking the limit of the fall of snow at sea level.

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Origin of snow line

First recorded in 1825–35
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

British Dictionary definitions for snow line

snow line

noun

the altitudinal or latitudinal limit of permanent snow
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for snow line

snow line

The boundary marking the lowest altitude at which a given area, such as the top of a mountain, is always covered with snow.
The boundary marking the furthest extent around the polar regions at which there is snow cover. The polar snow lines vary with the seasons.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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