thermosphere
/ˈθɝməsfɪɚ/
Word Rarity
Very rare
Frequency: Zipf frequency 1.80 in modern English
22
Scrabble Score
12
Letters
3
Syllables
8
Unique Chars
Meaning
noun
The layer of the Earth's atmosphere directly above the mesosphere and directly below the exosphere.
Example Sentences
- "The mesosphere may be described as the earth's intermediate or middle atmosphere, which separates the thermosphere above from the ozonosphere (or stratosphere) below, both of which are responsible for absorption of most of the ultraviolet part of the solar radiation and preventing it from reaching the earth's surface."
Etymology
Etymology tree Proto-Indo-European *gʷʰer- Proto-Indo-European *-mos Proto-Indo-European *gʷʰermos Proto-Hellenic *kʷʰermós Ancient Greek θερμός (thermós)der. English thermo- Ancient Greek σφαῖρᾰ (sphaîră)bor. Latin sphaera Late Latin sphērader. Old French spherebor. Middle English spere English sphere English -sphere English thermosphere From thermo- + -sphere.
Regional Pronunciation
- American English: /ˈθɝməsfɪɚ/
- British English: /ˈθɜːməsfɪə/