timberline
The highest point on a mountain where trees can grow is known as a timberline. Above the timberline, it's much too cold and windy for anything but small, shrubby plants to stay alive.
The timberline is sometimes called a "tree line" or "forest line." From far away, this point on a mountain can appear abrupt, but up close it's clear that as the altitude increases, the size and number of trees gradually decreases. Near the timberline, trees become stumpy and more shrub-like. In addition to lower temperatures and gusty winds, there is less air and moisture above the timberline — all factors that make it a hostile environment for trees.
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line marking the upper limit of tree growth in mountains or northern latitudessynonyms: timber line, tree linetype of:linea spatial location defined by a real or imaginary unidimensional extent
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Vocabulary lists containing timberline
Physical geography will be a breeze once you master this list of terms related to Earth's physical features. You'll review climate and weather, landforms and bodies of water, biomes and ecosystems, and the geological structure of the Earth — and that's just the tip of the iceberg!
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