| Radclyffe Hall | Radclyffe Hall |
| Radeberg | Radeberg |
| Radebeul | Radebeul |
| Radegast | Radagaiso |
| Radelfingen | Radelfingen |
| Radelgar of Benevento | Radelgar de Benevento |
| Radeon | Radeon |
| Radermachera sinica | Radermachera sinica |
| Radetzky class battleship | Clase Radetzky |
| Radetzky March | Marcha Radetzky |
| Radeče | Radeče |
| Radha | Radha |
| Radha Mitchell | Radha Mitchell |
| Radi Nedelchev | Radi Nedelchev |
| radial | cubierta radial |
| Radial basis function | Red neuronal artificial |
| Radial pulsation | Pulsación radial |
| radial tire | cubierta radial |
| radial-ply tire | cubierta radial |
| Radian | Radián |
| radiance | resplandor |
| radiancy | resplandor |
| radiant | radiante |
| radiant heater | radiador eléctrico |
| Radiata | Radiata |
| radiate | irradiar |
| radiate with joy | rebosar de alegría |
| radiating | brillante |
| radiation | radiación |
| Radiation background | Fondo de radiación |
| Radiation belt | Cinturón de radiación |
| radiation damage | daño de radiación |
| radiation dose | dosis de radiación |
| radiation effect | efectos de la radiación |
| radiation exposure | exposición de radiación |
| Radiation mechanisms | Mecanismo de radiación |
| radiation physics | física de radiación |
| Radiation poisoning | Envenenamiento por radiación |
| radiation protection | protección radiológica |
| radiation protection law | ley de protección contra la radiación |
| Radiation scattering | Dispersión de la radiación |
| radiation sickness | enfermedades de origen radiactivo |
| radiations | radiación |
| Radiative capture | Captura radioactiva |
| Radiative equilibrium | Equilibrio radiativo |
| Radiative forcing | Forzante radiativo |
| Radiative recombination | Recombinación radiativa |
| radiator | radiador |
| radical | extremista |
| Radical axis | Eje radical |
| Radical Cause | La Causa Radical |
| Radical Change | Partido Cambio Radical |
| Radical Civic Union | Unión Cívica Radical |
| Radical feminism | Feminismo radical |
| Radical of an ideal | Radical de un ideal |
| Radical Party | Partido Radical |
| Radical Republican Party | Partido Republicano Radical |
| radical sign | signo de raíz |
| radicalism | radicalismo |
| radically | radical |
| Radikal gazetesi | Radikal |
| radio | radio |
| Radio absorption | Absorción radio |
| Radio antennas | Antena radio |
| Radio background | Fondo de radiación radio |
| Radio Bart | Radio Bart |
| radio beacon | radiofaro |
| Radio Berlin International | Radio Berlín Internacional |
| Radio burst | Destello radio |
| Radio cores | Núcleo de emisión radio |
| Radio Days | Días de radio |
| Radio Disney | Radio Disney |
| Radio e Television Rumantscha | Radio e Television Rumantscha |
| Radio France Internationale | Radio Francia Internacional |
| Radio Free Roscoe | Radio Free Roscoe |
| radio frequency | frecuencia de radio |
| Radio galaxy | Radiogalaxia |
| Radio ham | Radioafición |
| Radio Havana Cuba | Radio Habana Cuba |
| Radio jet | Chorro radio |
| Radio Maria | Familia Mundial de Radio María |
| Radio Marti | Radio Martí |
| Radio Netherlands Worldwide | Radio Nederland Wereldomroep |
| Radio observatory | Observatorio radio |
| Radio occultations | Ocultación de radiofuente |
| radio play | novela de radio |
