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stratosphere.

The region of the uppermost atmosphere where the temperature increases along with the altitude due to the absorption of solar ultraviolet radiation by ozone.

12 characters3 syllables approx.English language

Meaning & usage

noun/ˈstɹætəsfɪə/Received-Pronunciation/ˈstɹætəsfɪɚ/General-American
  1. The region of the uppermost atmosphere where the temperature increases along with the altitude due to the absorption of solar ultraviolet radiation by ozone.

  2. Collectively, those layers of the Earth’s crust which primarily comprise stratified deposits.

    obsolete
Where this word comes from

From French stratosphère, a word coined by its discoverer, meteorologist Léon Teisserenc de Bort. From strato- + -sphere.

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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.

Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.