[{"word":"protium","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"An atom of this isotope.","synonyms":[],"antonyms":[]}],"synonyms":["H-1","hydrogen-1","hydrogen-one","U-1","unium-1","unium-one"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/protium"]}]