radio window
noun Astronomy.
the range of wavelengths at which the earth's atmosphere is transparent to radio waves.
Words nearby radio window
radio telescope,
radio tube,
radio valve,
radio wave,
radio waves,
radio window,
radio-,
radio-collar,
radio-controlled,
radioacoustics,
radioactinium
British Dictionary definitions for radio window
radio window
noun
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