English noun: ionosphere | |||
1. | ionosphere (location) the outer region of the Earth's atmosphere; contains a high concentration of free electrons | ||
Broader (hypernym) | part, region | ||
Part holonym | Appleton layer, D region, D-layer, E layer, E region, F layer, F region, Heaviside layer, Kennelly-Heaviside layer | ||
Part meronym | air, atmosphere | ||