| Amplifier |
| Laser's kin |
| Wave amplifier |
| Radiation device |
| Microwave device |
| Electronic device |
| Atomic clock part |
| Amplifying device |
| Amplifying devices |
| Radiation-beam device |
| Part of an atomic clock |
| Atomic clock timekeeper |
| Atomic clock standardizer |
| Electromagnetic amplifier |
| Microwave frequency device |
| Electromagnetic wave enhancer |
| Electromagnetic wave generator |
| Electromagnetic wave amplifier |
| Early atomic clock standardizer |
| Part of an atomic clock, perhaps |
| Amplifier of electromagnetic waves |
| Device amplifying electromagnetic waves |