radio emission(n = noun.phenomenon) radio radiation, radio wave - an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m;
is a kind of electromagnetic radiation, electromagnetic wave, nonparticulate radiation
is a part of radio-frequency spectrum, radio spectrum
has particulars: sky wave, ground wave, radio signal, carrier, carrier wave, short wave, medium wave, long wave

clock radio, electron emission, emission, emission spectrum, father of radio, field emission, greenhouse emission, infrared emission, nocturnal emission, omnidirectional radio range, photoelectric emission, positron emission tomography, positron emission tomography scanner, push-button radio, quasi-stellar radio source, radio, radio aerial, radio announcer, radio antenna, radio astronomy, radio beacon, radio beam, radio brightness, radio broadcast, radio chassis, radio compass, radio control, radio detection and ranging, radio frequency, radio interferometer, radio link, radio news, radio noise, radio observation, radio operator, radio radiation, radio receiver, radio reflector, radio set, radio signal, radio source, radio spectrum, radio station, radio technician, radio telescope, radio transmitter, radio wave, secondary emission, thermal emission, thermionic emission