HyperDic: appleton_layer

English > 1 sense of the expression Appleton layer:
NOUNlocationAppleton layer, F layer, F regionthe 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
English > Appleton layer: 1 sense > noun 1, location
MeaningThe 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.
SynonymsF layer, F region
Instance ofregion, partThe extended spatial location of something
Part ofionosphereThe outer region of the Earth's atmosphere

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