Dictionary

troposphere

noun tro·po·sphere \ˈtrō-pə-ˌsfir, ˈträ-\

Definition of TROPOSPHERE

:  the lowest densest part of the earth's atmosphere in which most weather changes occur and temperature generally decreases rapidly with altitude and which extends from the earth's surface to the bottom of the stratosphere
tro·po·spher·ic \ˌtrō-pə-ˈsfir-ik, ˌträ-, -ˈsfer-\ adjective

Origin of TROPOSPHERE

International Scientific Vocabulary
First Known Use: 1909

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