[rey-dee-oh-sond] /ˈreɪ di oʊˌsɒnd/
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.
an airborne instrument used to send meteorological information back to earth by radio Also called radiometeorograph
An instrument that is carried into the atmosphere by a balloon, makes measurements of temperature, air pressure, humidity, and wind speed and direction, and transmits the measurements back to the ground. A radiosonde is typically sent to altitudes of approximately 30 km (18.6 mi). There are approximately 70 radiosonde stations across the continental United States. Each station launches two radiosondes daily.
[rey-dee-oh-soh-dee-uh m] /ˌreɪ di oʊˈsoʊ di əm/ noun, Chemistry. 1. the radioactive isotope of having an atomic mass of 24 and a half-life of 14.9 hours: used as a tracer in biochemistry.
noun, Astronomy. 1. a cosmic object or phenomenon, as a galaxy, pulsar, quasar, or the remnant of a supernova or of a galactic collision, that emits radio waves. noun 1. a celestial object, such as a supernova remnant or quasar, that is a source of radio waves
noun 1. the portion of the electromagnetic spectrum that includes radio waves. noun 1. the range of electromagnetic frequencies used in radio transmission, lying between 10 kilohertz and 300 000 megahertz
noun, Astronomy Now Rare. 1. a radio source. noun 1. a former name for radio source