thermosphère
French, noun/tɛʁ.mɔs.fɛʁ/
thermosphère is spelled T-H-E-R-M-O-S-P-H-È-R-E (12 letters) and appears about once in every 28 million words in written French, the 170,198th most frequent French word form (wordfreq, 2021 data). Thermosphère is a French feminine noun meaning “thermosphere (layer of the Earth's atmosphere)” (English Wiktionary, September 2026). The French Wiktionary (Wiktionnaire) defines it as “Partie de l’atmosphère terrestre située au-dessus de la mésosphère et sous l'exosphère, à une altitude…”.
What does thermosphère mean in English?
noun
- 1
femininethermosphere (layer of the Earth's atmosphere)
Source: English Wiktionary, French section, dump of September 2, 2026 (CC BY-SA 4.0).
How French dictionaries define it
noun: 1. Partie de l’atmosphère terrestre située au-dessus de la mésosphère et sous l'exosphère, à une altitude d’environ 80 jusque 500 kilomètres environ; cette couche est caractérisée par une augmentation de la température avec l’altitude.
The definition in the French Wiktionary (Wiktionnaire), in French.
Source: French Wiktionary (Wiktionnaire), dump of September 1, 2026 (CC BY-SA 4.0), through kaikki.org.
Forms of thermosphère
- thermosphères plural
Source: English Wiktionary and French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026).
How do you pronounce thermosphère?
- /tɛʁ.mɔs.fɛʁ/
- \tɛʁ.mɔ.sfɛʁ\
- [tɛʁ.mɔ.sfɛʁ]
Sources: English Wiktionary, French Wiktionary (Wiktionnaire) (dumps of September 2, 2026 and September 1, 2026); recordings from Wikimedia Commons.
English words that translate to thermosphère
Source: the translation tables of the English Wiktionary, dump of September 2, 2026.
How common is thermosphère in French?
thermosphère appears about once in every 28 million words in written French.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).