[rey-dee-oh-vizh-uh n] /ˈreɪ di oʊˌvɪʒ ən/
noun, Now Rare.
- Radio valve
noun 1. another name for valve (sense 3)
noun, Electricity. 1. an electromagnetic wave having a wavelength between 1 millimeter and 30,000 meters, or a frequency between 10 kilohertz and 300,000 megahertz. noun 1. an electromagnetic wave of radio frequency radio wave A very low frequency electromagnetic wave (from roughly 30 kilohertz to 100 gigahertz). Radio waves are used for the transmission of […]
noun, Astronomy. 1. the range of wavelengths at which the earth’s atmosphere is transparent to radio waves. noun 1. a gap in ionospheric reflection that allows radio waves, with frequencies in the range 10 000 to 40 000 megahertz, to pass from or into space
radisectomy ra·di·sec·to·my (rā’dĭ-sěk’tə-mē) n. Variant of radectomy.