stratosphere
/ˈstɹætəsfɪɚ/ noun C2- The region of the uppermost atmosphere where the temperature increases along with the altitude due to the absorption of solar ultraviolet radiation by ozone.
Plural stratospheres
Learn stratosphere in real texts
With a free account, hover any word in the library for its meaning, hear it read aloud, save words for review timed to your memory, and see how much of each book you already know.