| Part of Speech | Definition | |
| Noun | 1. The highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission.[Wordnet]. | |
Source: WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | Top | |
Common Expressions: Appleton layer
| Expressions | Definition | ||
| Appleton layer | The highest region of the ionosphere (from 90 to 600 miles up) which contains the highest concentration of free electrons and is most useful for long-range radio transmission. Source: Wordnet 3.0 Copyright © 2006 by Princeton University. All rights reserved. | ||
Source: compiled by the editor from various references; see credits. | Top | ||
Specialty Expressions: Appleton layer
| Expressions | Domain | Definition | |
| Appleton layer | Aerospace | = F2-layer. See ionosphere. (references) | |
Source: compiled by the editor from various references; see credits. | Top | ||
