[{"word":"rad","phonetics":[{"audio":"https://api.dictionaryapi.dev/media/pronunciations/en/rad-au.mp3","sourceUrl":"https://commons.wikimedia.org/w/index.php?curid=79218849","license":{"name":"BY-SA 4.0","url":"https://creativecommons.org/licenses/by-sa/4.0"}},{"text":"/ɹæd/","audio":""},{"text":"/ɹæd/","audio":""}],"meanings":[{"partOfSpeech":"noun","definitions":[{"definition":"A non-SI unit of absorbed dose of radiation, equal to 0.01 gray.","synonyms":["rd"],"antonyms":[]}],"synonyms":["rd"],"antonyms":[]},{"partOfSpeech":"noun","definitions":[{"definition":"In the International System of Units, the derived unit of plane angular measure of angle equal to the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle. Symbol: rad","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"noun","definitions":[{"definition":"Anything which radiates or emits rays.","synonyms":[],"antonyms":[]},{"definition":"A device that lowers engine coolant temperature by conducting heat to the air, through metal fins.","synonyms":[],"antonyms":[]},{"definition":"(of buildings) A finned metal fixture that carries hot water or steam in order to heat a room.","synonyms":[],"antonyms":[]},{"definition":"A type of antenna.","synonyms":[],"antonyms":[]}],"synonyms":[],"antonyms":[]},{"partOfSpeech":"adjective","definitions":[{"definition":"Favoring fundamental change, or change at the root cause of a matter.","synonyms":[],"antonyms":[],"example":"His beliefs are radical."},{"definition":"Pertaining to a root (of a plant).","synonyms":[],"antonyms":[]},{"definition":"Pertaining to the basic or intrinsic nature of something.","synonyms":["fundamental"],"antonyms":["ignorable","trivial"]},{"definition":"Thoroughgoing; far-reaching.","synonyms":[],"antonyms":[],"example":"The spread of the cancer required radical surgery, and the entire organ was removed."},{"definition":"Of or pertaining to the root of a word.","synonyms":[],"antonyms":[]},{"definition":"(of a sound) Produced using the root of the tongue.","synonyms":[],"antonyms":[]},{"definition":"Involving free radicals.","synonyms":[],"antonyms":[]},{"definition":"Relating to a radix or mathematical root.","synonyms":[],"antonyms":[],"example":"a radical quantity; a radical sign"},{"definition":"(1980s & 1990s) Excellent; awesome.","synonyms":[],"antonyms":[],"example":"That was a radical jump!"}],"synonyms":["primitive","fundamental"],"antonyms":["derivative","derived","ignorable","trivial"]},{"partOfSpeech":"noun","definitions":[{"definition":"The distance between the front and rear sights of a firearm.","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/rad","https://en.wiktionary.org/wiki/radian","https://en.wiktionary.org/wiki/radiator","https://en.wiktionary.org/wiki/radical","https://en.wiktionary.org/wiki/sight%20radius"]}]