We found 2 dictionaries that define the word f layers:

General (1 matching dictionary)

1. F layers: Merriam-Webster

Science (1 matching dictionary)

2. F Layers: Extragalactic Astronomy

(Note: See f_layer as well.)

Definitions from Wiktionary (F layer) ▸ noun:  Synonym of F region ▸ Also see f_layer ▸ Words similar to f layers ▸ Usage examples for f layers ▸ Idioms related to f layers ▸ Wikipedia articles (New!) ▸ Words that often appear near f layers ▸ Rhymes of f layers ▸ Invented words related to f layers