[{"word":"rubidium","phonetic":"/ˌɹuːˈbɪd.i.əm/","phonetics":[{"text":"/ˌɹuːˈbɪd.i.əm/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.","synonyms":[],"antonyms":[]},{"definition":"A single atom of this element.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/rubidium"]}]