stratosphere

noun2

1. •
   The region of the uppermost atmosphere where the temperature increases along with the altitude due to the absorption of solar ultraviolet radiation by ozone.

   • Variation in height of the stratosphere (isothermal layer). — 1909
2. •
   (no longer used) Collectively, those layers of the Earth’s crust which primarily comprise stratified deposits.

   • The stratosphere, or younger sedimentary envelope has been formed almost entirely at the expense of the Sal envelope. — 1909