D layer

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D layer [′dē ‚lā·ər]

(geology)

The lower mantle of the earth, between a depth of 600 and 1800 miles (1000 and 2900 kilometers).

(geophysics)

The lowest layer of ionized air above the earth, occurring in the D region only in the daytime hemisphere; reflects frequencies below about 50 kilohertz and partially absorbs higher-frequency waves.

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No references found			Czerny-Turner spectrograph Czerski, Jan Czerwony Sztandar Czestochowa Czestochowa Wojewodztwo Czestochowa Województwo Czeszko, Bohdan Czochralski process Czolgosz, Leon Czolgosz, Leon F. Czuczor, Gergely Czynsz D D and M boards d Aquarids D cable D center d constant D display d electron D flip-flop D galaxy D glass D horizon D indicator D layer D line D meson D nickel D region D River State Recreation Site D scan D scope D sounding D value D variometer D&B Software D&CM D&H D&M D&MB D&SM D'a de la Santa Cruz D'a de los Charros D'a de los Muertos D'a de los Tres Reyes D'a de Negritos and Fiesta de los Blanquitos D'a de San Lorenzo D'a del Puno d'Acunha, Teresa d'Albert, Eugene			D County D Day D Day D Day D dimer D display D Dynamic Libraries d electron D Endroit Pour Une Rencontre D Env D Flip-Flop D Flip-Flop D Flip-Flop Asynchronous Preset and Clear D galaxy D gene D gene segment D glass D H Lawrence D Handle Round Point D Handle Square Point D Home-Otik D horizon D Hum D indicator D L D L D L D L Sayers D Lawrence D layer D LEVEL D line D Lit D Livingstone D Livingstone D log E curve D Lux Konseil D marginatus D marginatus D marginatus D marginatus D marginatus D MAX D meson D MIN D MINIMAX D MM D N Aidit D need D nickel D occidentalis D occidentalis D occidentalis D occidentalis D occidentalis D orbital D orbitals D Other mental disorders D Other mental disorders D Other mental disorders

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