[{"word":"xanthines","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"Any of a group of alkaloids that include caffeine, theophylline, and theobromine as well as the parent compound, a precursor of uric acid found in many organs of the body.","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/xanthine","https://en.wiktionary.org/wiki/xanthines"]}]