D region

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English[edit]

Alternative forms[edit]

Etymology[edit]

(This etymology is missing or incomplete. Please add to it, or discuss it at the Etymology scriptorium.)

Proper noun[edit]

the D region

  1. The innermost layer of the ionosphere, located 48 km (30 mi) to 90 km (56 mi) above the surface of the Earth.

Synonyms[edit]

Further reading[edit]

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