sonde

noun

\ ˈsänd

Definition of sonde

: any of various devices for testing physical conditions (as at high altitudes, below the earth's surface, or inside the body)

Recent Examples on the Web

In addition to the jet — which is also equipped with Doppler radar to study wind — the program is launching other sondes, from a ship and a small atoll near the Equator. — Henry Fountain, New York Times, "Studying the Heart of El Niño, Where Its Weather Begins," 1 Feb. 2016 A brief whooshing noise was the only indication that a sonde had been released. — Henry Fountain, New York Times, "Studying the Heart of El Niño, Where Its Weather Begins," 1 Feb. 2016

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