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[rey-dee-oh-sond] /ˈreɪ di oʊˌsɒnd/
noun, Meteorology.
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
1935-40; radio- + sonde Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for radiosonde


an airborne instrument used to send meteorological information back to earth by radio Also called radiometeorograph
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
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radiosonde in Science
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.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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