#airstream  a relatively well-defined prevailing wind
  supertype:  #wind  air moving (sometimes with considerable force) from an area of high pressure to an area of low pressure; "trees bent under the fierce winds"; "when there is no wind, row"
  subtype:  #jet_stream__jetstream  a high-speed high-altitude airstream blowing from west to east near the top of the troposphere; has important effects of the formation of weather fronts

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