411 REFERENCE · Wiktionary
E region
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.
English
Etymology
en
Proper noun
E region 1
The Kennelly-Heaviside layer.
en Atmosphere
411 REFERENCE · Wiktionary
Reference material by Wiktionary contributors. This retains its source identity and is not 411 news reporting.