noun Date: 1926 the part of the earth's atmosphere in which ionization of atmospheric gases affects the propagation of radio waves, which extends from about 30 miles (50 kilometers) to the exosphere, and which is contiguous with the upper portion of the mesosphere and the thermosphere; also a comparable region of charged particles surrounding another celestial body (as Venus) • ionospheric adjectiveionospherically adverb

New Collegiate Dictionary. 2001.

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  • IONOSPHÈRE — L’atmosphère est ionisée sur toute la surface du globe à partir d’une altitude d’environ 60 km, au dessous de laquelle l’ionisation est négligeable; cette région de l’atmosphère est appelée ionosphère. Vers les altitudes supérieures, l’ionisation …   Encyclopédie Universelle

  • Ionosphere — Ionosphère L’ionosphère est une région de l atmosphère terrestre située entre la mésosphère et la magnétosphère, c est à dire entre 60 et 800 km d altitude. Elle est constituée de gaz fortement ionisé (=plasma) à très faible pression (entre 2×10… …   Wikipédia en Français

  • ionosphere — n. the outer region of the earth s atmosphere, beyond which is the {exosphere}; it contains a high concentration of free electrons and ions, and extends from about 50 miles to about 250 miles above the earth s surface, but the height shows daily… …   The Collaborative International Dictionary of English

  • ionosphere — 1926, from ION (Cf. ion) + SPHERE (Cf. sphere). Coined by Scottish radar pioneer Robert A. Watson Watt (1892 1973). So called because it contains many ions …   Etymology dictionary

  • ionosphere — ► NOUN ▪ the layer of the atmosphere above the mesosphere, which contains a high concentration of ions and electrons and is able to reflect radio waves. DERIVATIVES ionospheric adjective …   English terms dictionary

  • ionosphere — [ī än′ə sfir΄] n. [< ION + O + SPHERE] the outer part of the earth s atmosphere, beginning at an altitude of c. 55 km ( c. 34 mi) and extending to the highest parts of the atmosphere: it contains several regions that consist of a series of… …   English World dictionary

  • Ionosphere — The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner …   Wikipedia

  • Ionosphère — L ionosphère est l’atmosphère supérieure d’une planète, en référence à son état de conductibilité électrique qui est caractérisé par une ionisation partielle des gaz. L’ionosphère terrestre comprend trois régions neutres, à savoir la mésosphère,… …   Wikipédia en Français

  • ionosphere — ionospheric /uy on euh sfer ik/, adj. /uy on euh sfear /, n. the region of the earth s atmosphere between the stratosphere and the exosphere, consisting of several ionized layers and extending from about 50 to 250 mi. (80 to 400 km) above the… …   Universalium

  • ionosphere — The region of the atmosphere, extending from approximately 30 to 250 miles (50 to 400 km), in which there is appreciable ionization. The ionized layers in the atmosphere reflect radio waves, making long wave communications possible over the… …   Aviation dictionary

  • ionosphere — jonosfera statusas T sritis fizika atitikmenys: angl. ionosphere vok. Ionosphäre, f rus. ионосфера, f pranc. ionosphère, f …   Fizikos terminų žodynas

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