[{"word":"cysteine","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A sulphur-containing nonessential amino acid C3H7NO2S found in most animal proteins; it readily oxidizes to cystine.","synonyms":[],"antonyms":[]}],"synonyms":["Cys","E910","food additive","E920","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/cysteine"]}]