| RADIO | the strength of a radio wave picked up by a radio telescope |
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| RADIO | a broadcast via radio |
| RADIO | a chassis for a radio receiver |
| RADIO | a direction finder that gives a bearing by determining the direction of incoming radio signals |
| RADIO | measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects |
| RADIO | an electromagnetic wave with a wavelength between 0.5 cm to 30,000 m |
| RADIO | an electromagnetic wave frequency between audio and infrared |
| RADIO | radio telescope that uses interference patterns from two antennas instead of a parabolic antenna |
| RADIO | a two-way radio communication system (usually microwave) |
| RADIO | a radio broadcast of news |
| RADIO | static at radio wavelengths |
| RADIO | an observation made with a radio telescope |