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rawin

[rey-win]
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noun
  1. a method of observation of upper-air winds conducted by means of a weather balloon tracked by radar or a radio direction finder.
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Compare raob, rawinsonde.

Origin of rawin

1945–50; ra(dio) + win(ds-aloft)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018