troposphere

== English == === Etymology === Borrowed from French troposphère. Equivalent to tropo- +‎ -sphere. === Pronunciation === === Noun === troposphere (plural tropospheres) 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. ==== Translations ==== === Anagrams === protosphere, pterophores