d-layer

2 definitions found

d-layer - Collaborative International Dictionary of English v.0.48 :

  D-layer \D-layer\ n.
     the lowest region of the ionosphere (35 to 50 miles up) that
     reflects low-frequency radio waves.
  
     Syn: D region.
          [WordNet 1.5]

d-layer - WordNet (r) 2.1 (2005) :

  D-layer
      n 1: the lowest region of the ionosphere (35 to 50 miles up)
           that reflects low-frequency radio waves [syn: D-layer, D region
           ]