polar cap
| aurora
| polar cap | |
| astr. | Polkappe; Polkalotte |
| Aurora | |
| gen. | Aurora |
| aurora | |
| hi.energ. | polare Aurora |
| opt. | Nordlicht |
| |||
| Polkappe f; Polkalotte f | |||
| Polarkappe f | |||
|
polar cap : 7 phrases in 4 subjects |
| General | 1 |
| High energy physics | 3 |
| Natural sciences | 1 |
| Radio | 2 |