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Definition of: radiosonde
(rā′dē·ō·sond′) noun Meteorol
A device, attached to a small balloon sent aloft, which measures the pressure, temperature, and humidity of the upper air and radios the data to the ground. Also ra′di·o·me′te·or·o·graph′ (-mē′tē·ər·ə·graf′, -gräf′). [<RADIO- + F sonde sounding]
a. Instrument box.
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