[{"word":"sirtuin","phonetic":"/ˈsɚ.tu.ɪn/","phonetics":[{"text":"/ˈsɚ.tu.ɪn/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"Any of several enzymes that act as regulatory factors that mediate the life-extending effects of a low-calorie diet.","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/sirtuin"]}]