f region

f re·gion
F f


    • US Pronunciation
    • US IPA
    • [ef ree-juh n]
    • /ɛf ˈri dʒən/
    • US Pronunciation
    • US IPA
    • [ef ree-juh n]
    • /ɛf ˈri dʒən/

Definitions of f region words

  • noun f region the ionospheric region in which the F layer forms. 1
  • noun f region the highest region of the ionosphere, extending from a height of about 150 kilometres to about 1000 kilometres. It contains the highest proportion of free electrons and is the most useful region for long-range radio transmission 0
  • noun f region the highest atmospheric zone within the ionosphere, at an altitude of c. 140 to 400 km (c. 90 to 250 mi), containing the F layers 0

Information block about the term

Origin of f region

First appearance:

before 1925
One of the 11% newest English words
First recorded in 1925-30

Historical Comparancy

Parts of speech for F region


f region popularity

A pretty common term. Usually people know it’s meaning, but prefer to use a more spread out synonym. About 47% of English native speakers know the meaning and use word.
According to our data about 58% of words is more used. This is a rare but used term. It occurs in the pages of specialized literature and in the speech of educated people.

f region usage trend in Literature

This diagram is provided by Google Ngram Viewer

See also

Matching words

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