troposphere
nounUK /ˈtɹɒpəsfɪə/ · US /ˈtɹoʊpəsfɪɚ/
Etymology Borrowed from French troposphère. Equivalent to tropo- + -sphere.
1
The lower levels of the atmosphere extending from the surface of the Earth or another celestial body up to the tropopause. It is characterized by convective air movements and a large vertical temperature change.
- Derived terms
- tropospheric