F REGION

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does F region mean? 

• F REGION (noun)
  The noun F REGION has 1 sense:

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

  Familiarity information: F REGION used as a noun is very rare.

 Dictionary entry details 

• F REGION (noun)

Sense 1

Meaning:

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

Classified under:

Nouns denoting spatial position

Synonyms:

Appleton layer; F layer; F region

Instance hypernyms:

part; region (the extended spatial location of something)

Holonyms ("F region" is a part of...):

ionosphere (the outer region of the Earth's atmosphere; contains a high concentration of free electrons)