[{"word":"cystine","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A nonessential amino acid formed by the oxidation of cysteine; it contains two cysteine residues linked by a disulfide bond.","synonyms":[],"antonyms":[]}],"synonyms":["E921","improving agent"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/cystine"]}]