Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun d-layer

1 sense of d-layer

Sense 1
D-layer, D region -- (the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves)
       INSTANCE OF=> region, part -- (the extended spatial location of something; "the farming regions of France"; "religions in all parts of the world"; "regions of outer space")