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We found 19 dictionaries with English definitions that include the word f region:
Click on the first link on a line below to go directly to a page where "f region" is defined.

General (13 matching dictionaries)

1. F region: Merriam-Webster.com [home, info]
2. F region: American Heritage Dictionary of the English Language [home, info]
3. F region: Collins English Dictionary [home, info]
4. F region: Vocabulary.com [home, info]
5. F region: Infoplease Dictionary [home, info]
6. F region: Dictionary.com [home, info]
7. F region: Wikipedia, the Free Encyclopedia [home, info]
8. F region: Rhymezone [home, info]
9. f region: Free Dictionary [home, info]
10. f region: Mnemonic Dictionary [home, info]
11. f region: WordNet 1.7 Vocabulary Helper [home, info]
12. F region: LookWAYup Translating Dictionary/Thesaurus [home, info]
13. F region: Dictionary/thesaurus [home, info]

Computing (1 matching dictionary)

14. F region: Encyclopedia [home, info]

Science (1 matching dictionary)

15. F Region: Extragalactic Astronomy [home, info]

Slang (1 matching dictionary)

16. F region: Urban Dictionary [home, info]

Tech (3 matching dictionaries)

17. F-region: Glossary of Meteorology [home, info]
18. F Region: National Weather Service Glossary [home, info]
19. F region: SOLAR-TERRESTRIAL TERMS [home, info]

(Note: See f_regions for more definitions.)

Quick definitions from WordNet (F region) ▸ noun:  the highest region of the ionosphere (from 90 to 600 miles up) that contains the highest concentration of free electrons and is most useful for long-range radio transmission ▸ Also see f_regions ▸ Words similar to f region ▸ Usage examples for f region ▸ Words that often appear near f region ▸ Rhymes of f region ▸ Invented words related to f region