D-LAYER

Pronunciation (US):

 Dictionary entry overview: What does D-layer mean? 

• D-LAYER (noun)
  The noun D-LAYER has 1 sense:

1. the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

  Familiarity information: D-LAYER used as a noun is very rare.

 Dictionary entry details 

• D-LAYER (noun)

Meaning:

The lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves

Classified under:

Nouns denoting spatial position

Synonyms:

D region; D-layer

Instance hypernyms:

part; region (the extended spatial location of something)

Holonyms ("D-layer" is a part of...):

ionosphere (the outer region of the Earth's atmosphere; contains a high concentration of free electrons)