[{"word":"lanthanum","phonetic":"/ˈlænθənəm/","phonetics":[{"text":"/ˈlænθənəm/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A chemical element (symbol La) with an atomic number of 57: a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.","synonyms":[],"antonyms":[]},{"definition":"An 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/lanthanum"]}]