E layer

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a region of the ionosphere (from 50 to 90 miles up) that reflects radio waves of medium length
• Syn:
Heaviside layer, Kennelly-Heaviside layer, E region
• Instance Hypernyms:
region, part
• Part Holonyms:
ionosphere

• Từ đồng nghĩa / Synonyms:
  Heaviside layer, Kennelly-Heaviside layer, E layer, E region