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E________
Definitions
the outermost atmospheric layer
Word origin
From exo- + -sphere.
Used in a sentence
“"Scientists weren't even sure Dione would be big enough to hang on to an exosphere" ('Cassini Detects Hint of Fresh Air at Dione', , JPL, Mar. 02, 2012)”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
No curated clues for exosphere yet.