You searched for: “atmospheric radio wave
atmospheric radio wave (s) (noun), atmospheric radio waves (pl)
A radio wave that is propagated by reflection through the atmosphere by reflections and refractions occurring in the atmosphere: Atmospheric radio waves may include either the ionospheric wave or the tropospheric wave, or both of them.
This entry is located in the following units: atmo-, atm- + (page 5) sphero-, spher-, -sphere- (page 4)