 d_region |
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| 1. | [ noun ] (astronomy) the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves | |
| Synonyms: | D-layer | |
| Related terms: | region ionosphere | |
| d_region |
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| 1. | [ noun ] (astronomy) the lowest region of the ionosphere (35 to 50 miles up) that reflects low-frequency radio waves | |
| Synonyms: | D-layer | |
| Related terms: | region ionosphere | |
