chemosphere

[ kee-muh-sfeer, kem-uh- ]

noun

1. the region of the atmosphere most characterized by chemical, especially photochemical, activity, starting in the stratosphere and including the mesosphere and perhaps part of the thermosphere.

chemosphere

/ ˈkɛməˌsfɪə; ˌkɛməˈsfɛrɪk /

noun

1. meteorol a rare name for thermosphere

Derived Forms

• chemospheric, adjective

Word History and Origins

Origin of chemosphere¹

First recorded in 1945–50; chemo- + -sphere