n.
Pronunciation: ' tr ō -p ə - ˌ sfir, ' trä-
Function: noun
Etymology: International Scientific Vocabulary
Date: 1909
: 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 \ ˌ tr ō -p ə - ' sfir-ik, ˌ trä-, - ' sfer- \ adjective