Dictionary
ra•di•o•sonde
Pronunciation: (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.