 |
| German | English |
| U-förmiges Labyrinth | U-shaped maze |
| 238U-Kammer | 238U chamber |
| U-Labyrinth | U-shaped maze |
| u.p.m. | r.p.m. (Umdrehungen Pro Minute) |
| U Strahlungsbelastung | exposure (incidence of ionizing radiation on persons, groups of the population, or the whole population) |
| U Strahlungsbelastung | radiation exposure |
| U Strahlungsbelastung | radiation burden |
| US-Atomenergie-Kommission | United States Atomic Energy Commission |
| US-Atomenergie-Kommission | Atomic Energy Commission |