Dictionary![]() ![]() ra•di•o•sondePronunciation: (rā'dē-ō-sond"), [key] —n. Meteorol. 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. Cf. rawinsonde Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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