Exosphere
Last Updated: January 2, 2026 at 12:30 PM
Scrabble:21 ptsWWF:21 pts9 letters
Definition of Exosphere
noun
- The uppermost layer of a planet's atmosphere
- An extremely thin atmosphere, as on Saturn's moon Dione
""Scientists weren't even sure Dione would be big enough to hang on to an exosphere" ('Cassini Detects Hint of Fresh Air at Dione', Cassini Solstice Mission, JPL, Mar. 02, 2012)"
Anagrams of Exosphere
Words You Can Make
50 words can be made from the letters in "exosphere":