snow line

== English == === Alternative forms === snow-line === Pronunciation === === Noun === snow line (plural snow lines) The altitude, in a mountainous region, above which the ground is covered with snow, at any particular time. Synonym: snow level Coordinate term: tree line (astrophysics) The inner limit where volatile molecules can remain frozen in the zone around a star. Synonym: frost line (astrophysics, specifically) The limit for water remaining solid instead of evaporating away under solar radiation. ==== Derived terms ==== (astronomy): water snow line carbon monoxide snow line ==== See also ==== (astronomy): habitable zone Venus zone === Further reading === frost line (astrophysics) on Wikipedia.Wikipedia