| radio de transistores | transistor radio |
| Radio de van der Waals | Van der Waals radius |
| Radio Disney | Radio Disney |
| Radio e Television Rumantscha | Radio e Television Rumantscha |
| Radio Francia Internacional | Radio France Internationale |
| Radio Free Roscoe | Radio Free Roscoe |
| Radio Habana Cuba | Radio Havana Cuba |
| Radio iRATE | IRATE radio |
| Radio iónico | Ionic radius |
| Radio límite por efecto de ma | Tidal radius |
| Radio Martí | Radio Marti |
| Radio Moscú | Voice of Russia |
| Radio Nederland Wereldomroep | Radio Netherlands Worldwide |
| Radio NOAA | NOAA Weather Radio All Hazards |
| Radio Praga | Radio Prague |
| Radio solar | Solar radius |
| Radio Telefís Éireann | Radio Telefís Éireann |
| Radio Televizioni Shqiptar | Radio Televizioni Shqiptar |
| Radio Télévision Belge de la Communauté Française | RTBF |
| Radio Télévision Libre des Mille Collines | Radio Télévision Libre des Mille Collines |
| Radio Vaticano | Vatican Radio |
| Radio y Televisión de Andalucía | Radiotelevisión Andaluza |
| Radio y Televisión de Portugal | Rádio e Televisão de Portugal |
| radioactividad | radioactivity |
| radioactivo | radioactive |
| Radioaficionado | Ham |
| Radioafición | Radio |
| radiodifusión | broadcasting |
| Radiodifusión de audio digital | Digital Audio Broadcasting |
| radiofaro | radio beacon |
| Radiofuente cuasi-estelar | Quasi stellar radio source |
| Radiofuente discreta | Discrete radio source |
| Radiofuente extragaláctica | Extragalactic radio source |
| Radiogalaxia | Radio galaxy |
| radiografiar | X-ray |
| radiografía | X-ray |
