radiosonde

(dē ō sänd′)

noun

a compact package of meteorological instruments and a radio transmitter, usually carried aloft by a small balloon to measure and transmit to ground observers temperature, pressure, and humidity data from the upper atmosphere

Origin: Fr < radio (see radio) + sonde, a sounding line < sonder, to sound

See radiosonde in American Heritage Dictionary 4

noun
An instrument carried aloft, chiefly by balloon, to gather and transmit meteorological data.

Origin:

Origin: radio

Origin: + French sonde, sounding line (from Old French, from Old English sund(rāp), sounding (line), from sund, sea)

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