F layer

noun

Definition of F layer

: the highest and most densely ionized regular layer of the ionosphere occurring at night within the F region

First Known Use of f layer

1928

in the meaning defined above

See Words from the same year
NEW! Time Traveler

Learn More about f layer


Seen and Heard

What made you want to look up F layer? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

meaningless speech or writing

Get Word of the Day daily email!

Test Your Vocabulary

Name More Food!

How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
SCRABBLE® Sprint

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!