troposphere Hear it!

troposphere definition

tropo·sphere (trō′pə sfir′, träp′ə-)

noun

the atmospheric zone or shell below the tropopause, characterized by water vapor, vertical winds, weather, and decreasing temperatures with increasing altitude

Etymology: Fr troposphère < Gr tropos, a turning (see trope) + Fr sphère (see sphere)

Related Forms:

  • tropospheric tro′po·spher′ic (-sfer′ik, -sfir′-) adjective

Webster's New World College Dictionary Copyright © 2009 by Wiley Publishing, Inc., Cleveland, Ohio.
Used by arrangement with John Wiley & Sons, Inc.

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