[{"word":"corundum","phonetic":"/kəˈɹʌn.dəm/","phonetics":[{"text":"/kəˈɹʌn.dəm/","audio":""},{"text":"/kəˈɹʌn.dəm/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"An extremely hard mineral, a form of aluminum oxide with the chemical formula Al2O3, that occurs in the form of the gemstones sapphire and ruby; it is used as an abrasive.","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/corundum"]}]