[{"word":"protactinium","phonetic":"/ˌpɹəʊ.tækˈtɪn.i.əm/","phonetics":[{"text":"/ˌpɹəʊ.tækˈtɪn.i.əm/","audio":""},{"text":"/ˌpɹoʊ.tækˈtɪn.i.əm/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A chemical element (symbol Pa) with atomic number 91: a dense, silvery-gray actinide metal.","synonyms":[],"antonyms":[]}],"synonyms":["protoactinium"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/protactinium"]}]