Adjective
Of radio waves, having a wavelength of approximately 100 to 1000 meters
Of radio equipment, capable of transmitting or receiving signals at such a wavelength.
Source: en.wiktionary.orgIt fluoresces bright yellowish white under shortwave, mediumwave and longwave ultraviolet radiation. Source: Internet
This prevents skywave propagation from being very effective on mediumwave frequencies in daylight hours. Source: Internet
Radio amateurs may have conducted the first successful transatlantic tests citation in December 1921, operating in the 200 meter mediumwave band (1500 kHz) the shortest wavelength then available to amateurs. Source: Internet