exosphère

== French == === Etymology === From exo- +‎ -sphère. === Pronunciation === IPA(key): /ɛɡ.zɔs.fɛʁ/ === Noun === exosphère f (plural exosphères) exosphere (layer of the Earth's atmosphere) ==== Derived terms ==== exosphérique === Further reading === “exosphère”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012