| Radioisotop | radioisotope |
| Radiobutton | radio button |
| Radiosonde | radio altimeter |
| Radiologe | radiologist |
| Radiotaste | radio button |
| Radiator | radiator |
| Radiologie | radiology |
| Radiologin | radiologist |
| Radiometer | radiometer |
| Radioröhre | thermionic valve |
| radioaktiv | radioactive |
| anisotrop | anisotropic |
| isotop | isotopic |
| Isotop | isotope |
| Radiochemie | radiochemistry |
| Radiolarie | radiolarian |
| Radionuklid | radionuclide |
| Radsatz | wheelset |
| radio- | radio- |
| Prädikator | predicator |