|
|
 |
|
|
|
|
| Van Al·len belt (plural Van Al·len belts) or Van Al·len ra·di·a·tion belt (plural Van Al·len ra·di·a·tion belts) |
noun |
|
| Definition: |
| |
ring of particles around Earth: either of two belts surrounding Earth and containing charged particles held there by the Earth's magnetic field
|
|
|
|
