troposphere noun. ['trɒpǝsfɪǝ, 'trǝʊp-] E20.
[from TROPO- + -SPHERE.]
Meteorology. The lowest region of the atmosphere, extending to a height of between 8 and 18 km (5 and 11 miles) and marked by convection and a general decrease of temperature with height.

■ tropo'spheric adjective of, pertaining to, or involving the troposphere;

■ tropospheric scatter = TROPOSCATTER: M20.

[TahlilGaran] English Dictionary ▲