| |||
| piano-parallel | |||
| parallel-plane; plane-parallel | |||
| plane parallel | |||
|
planparallel : 25 phrases in 12 subjects |
| Antennas and waveguides | 3 |
| Astronomy | 1 |
| Communications | 1 |
| Construction | 1 |
| Earth sciences | 1 |
| Electronics | 1 |
| General | 1 |
| Industry | 1 |
| Life sciences | 3 |
| Optics branch of physics | 10 |
| Physics | 1 |
| Technology | 1 |