| radiogramma | radiogram |
| Radiohead | Radiohead |
| Radiointerferometri | Radio interferometers |
| Radiointerferometria | Radio interferometry |
| radiolina | transistor radio |
| radiologa | radiographer |
| radiologia | radiology |
| radiologo | radiographer |
| Radiometri | Radiometers |
| Radiometri di Dicke | Dicke radiometers |
| Radionica | Radionics |
| radionuclide | radionuclide |
| Radiooccultazioni | Radio occultations |
| Radioonda | Radiowave |
| Radioosservatori | Radio observatory |
| Radiopulsar | Radio pulsar |
| radioscopia | screening |
| Radiosità | Radiosity |
| radioso | beaming |
| Radiosorgenti | Radio sources |
| Radiosorgenti discrete | Discrete radio sources |
| Radiosorgenti extragalattiche | Extragalactic radio source |
| Radiospettri | Radio spectra |
| Radiospettrografi | Radio spectrograph |
| Radiospettrometri | Radio spectrometers |
| Radiospettroscopia | Radio spectroscopy |
| Radiostelle | Radio stars |
| Radiostruttura | Radio structure |
| Radiotaxi | Radio-taxi |
| radiotelefono | radiotelephone |
| radiotelegramma | radiogram |
