troposphere

Noun
  1. The lowest atmospheric layer;
    From 4 to 11 miles high (depending on latitude) (synset 109485730)
    is a type of: layer - a relatively thin sheetlike expanse or region lying over or under another
    has: tropopause - the region of discontinuity between the troposphere and the stratosphere
    is a part of: atmosphere - the envelope of gases surrounding any celestial body

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