[{"word":"upsilon","phonetic":"/juːpˈsaɪ.lən/","phonetics":[{"text":"/juːpˈsaɪ.lən/","audio":""},{"text":"/ˈjup.sɪˌlɑn/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.","synonyms":[],"antonyms":[]},{"definition":"(particle physics) An upsilon meson, or bottomonium.","synonyms":[],"antonyms":[]}],"synonyms":["ypsilon"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/upsilon"]}]