Stratosphere

n. layer of the Earth's atmosphere located between the troposphere and the mesosphere

This article is about the stratosphere layer; for the hotel in Las Vegas, Nevada, see Stratosphere Las Vegas.The stratosphere is the second layer of Earth's atmosphere, just above the troposphere, and below the mesosphere. It is stratified in temperature, with warmer layers higher up and cooler layers farther down. This is in contrast to the troposphere near the Earth's surface, which is cooler higher up and warmer farther down. The border of the troposphere and stratosphere, the tropopause, is marked by where this inversion begins, which in terms of atmospheric thermodynamics is the equilibrium level. The stratosphere is situated between about 10 km (6 miles) and 50 km (31 miles)  altitude above the surface at moderate latitudes, while at the poles it starts at about 8 km (5 miles) altitude.
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Noun
1. the atmospheric layer between the troposphere and the mesosphere
(hypernym) layer
(part-holonym) atmosphere
(part-meronym) ozone layer, ozonosphere

n. stratosphere, layer of the Earth's atmosphere located between the troposphere and the mesosphere

The portion of the atmosphere 10-to-25 miles above the earth's surface.