Synonyms for E layer:

n.

e layer (noun)
Heaviside Layer, Kennelly-heaviside Layer, e region.
location (noun)
Heaviside Layer, Kennelly-heaviside Layer, e region.

Other synonyms:

E region
e region.
Heaviside layer
Heaviside Layer.
Kennelly-Heaviside layer
Kennelly-heaviside Layer.