[{"word":"bradycardia","phonetics":[],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"The condition of having a slow heartbeat, defined as under 60 beats per minute for an adult.","synonyms":["brachycardia"],"antonyms":["tachycardia"]}],"synonyms":["brachycardia"],"antonyms":["tachycardia"]}],"license":{"name":"CC BY-SA 3.0","url":"https://creativecommons.org/licenses/by-sa/3.0"},"sourceUrls":["https://en.wiktionary.org/wiki/bradycardia"]}]