Related formsex·o·spher·i·cal [ek-suh-sfer-i-kuh l, -sfeer-] /ˌɛk səˈsfɛr ɪ kəl, -ˈsfɪər-/, ex·o·spher·ic, adjective
Examples from the Web for exosphere
The atoms of the exosphere were lonely, uncrowded, isolated particles.
His instruments told him they were breaching the exosphere, where molecular matter had almost ceased to exist.
In the shed on the left is Orion, which is a two-stage rocket for deep penetration into the exosphere.The Scarlet Lake Mystery|Harold Leland Goodwin