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radiosonde

[rey-dee-oh-sond]
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noun Meteorology.
  1. an instrument that is carried aloft by a balloon to send back information on atmospheric temperature, pressure, and humidity by means of a small radio transmitter.
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Origin of radiosonde

First recorded in 1935–40; radio- + sonde
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for radiosonde

radiosonde

noun
  1. an airborne instrument used to send meteorological information back to earth by radioAlso called: radiometeorograph
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Word Origin

C20: radio- + French sonde sounding line
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

radiosonde in Science

radiosonde

[rādē-ō-sŏnd′]
  1. An instrument that is carried into the atmosphere by a balloon, makes measurements of temperature, air pressure, humidity, and wind speed and direction, and transmits the measurements back to the ground. A radiosonde is typically sent to altitudes of approximately 30 km (18.6 mi). There are approximately 70 radiosonde stations across the continental United States. Each station launches two radiosondes daily.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.