[{"word":"isoprene","phonetic":"/ˈaɪsə(ʊ)pɹiːn/","phonetics":[{"text":"/ˈaɪsə(ʊ)pɹiːn/","audio":""},{"text":"/ˈaɪsəˌpɹin/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"An unsaturated hydrocarbon, C5H8, that is readily polymerized; natural rubber (caoutchouc) is cis-1,4-polyisoprene, and trans-1,4-polyisoprene is present in gutta-percha and balata; it is the structural basis for the terpenes.","synonyms":[],"antonyms":[]}],"synonyms":["2-methyl-1,3-butadiene"],"antonyms":[]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/isoprene"]}]