Word Study
f layer
WORDNET DICTIONARY
Noun f layer has 1 sense
- f layer(n = noun.location) appleton layer, f region - 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; Array is a part of ionosphere
is a kind of part, region
For further exploring for "f layer" in Webster Dictionary Online
