[{"word":"exosphere","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The uppermost layer of a planet's atmosphere","synonyms":[],"antonyms":[]},{"definition":"An extremely thin atmosphere, as on Saturn's moon Dione","synonyms":[],"antonyms":[],"example":"\"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)"}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/exosphere"]}]