[{"word":"ultracold","phonetics":[],"meanings":[{"partOfSpeech":"adjective","definitions":[{"definition":"Of a temperature close to absolute zero, especially one at which quantum-mechanical properties are observed.","synonyms":[],"antonyms":[]},{"definition":"Extremely cold.","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/ultracold"]}]