nounπShareA non-SI unit of absorbed dose of radiation, equal to 0.01 gray."The patient received a dose of five rad of radiation during the X-ray procedure. "medicinephysicsenergyunitscienceChat with AIVocabulary GamePractice Reading
nounπShareIn 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"The surveyor measured the angle of the land slope as 0.5 rad. "mathphysicsunitChat with AIVocabulary GamePractice Reading
nounπShareAnything which radiates or emits rays."The scientist carefully measured the energy emitted by the rad to understand its radioactive decay. "energyphysicsscienceChat with AIVocabulary GamePractice Reading
nounπShareA device that lowers engine coolant temperature by conducting heat to the air, through metal fins."The mechanic checked the rad for leaks after noticing the car was overheating. "vehiclemachinedevicetechnicalpartChat with AIVocabulary GamePractice Reading
nounπShare(of buildings) A finned metal fixture that carries hot water or steam in order to heat a room."During the winter, the rad in our classroom kept us warm by radiating heat. "architecturebuildingChat with AIVocabulary GamePractice Reading
nounπShareA type of antenna."The technician installed a new rad on the roof to improve the radio signal for the school's wireless network. "technologyelectronicscommunicationdevicemachineChat with AIVocabulary GamePractice Reading
adjectiveπShareFavoring fundamental change, or change at the root cause of a matter."His beliefs are radical."politicsattitudephilosophysocietyChat with AIVocabulary GamePractice Reading
adjectiveπSharePertaining to a root (of a plant)."The botanist carefully examined the rad of the dandelion plant. "plantbiologyagricultureChat with AIVocabulary GamePractice Reading
adjectiveπSharePertaining to the basic or intrinsic nature of something."The rad reason the company values teamwork is to foster innovation. "naturequalityChat with AIVocabulary GamePractice Reading
adjectiveπShareThoroughgoing; far-reaching."The spread of the cancer required radical surgery, and the entire organ was removed."qualitystyleChat with AIVocabulary GamePractice Reading
adjectiveπShareOf or pertaining to the root of a word."The rad morpheme "-port-" in the words "import," "export," and "transport" carries the core meaning of "carry" or "bear." "grammarlanguagelinguisticswordChat with AIVocabulary GamePractice Reading
adjectiveπShare(of a sound) Produced using the root of the tongue."The singer's voice had a rad quality, produced by the way her tongue vibrated at the root. "phoneticslanguagesoundlinguisticsChat with AIVocabulary GamePractice Reading
adjectiveπShareInvolving free radicals."The antioxidant cream is designed to protect your skin from rad damage caused by pollution. "chemistrybiochemistryChat with AIVocabulary GamePractice Reading
adjectiveπShareRelating to a radix or mathematical root."a radical quantity; a radical sign"mathChat with AIVocabulary GamePractice Reading
adjectiveπShare(1980s & 1990s) Excellent; awesome."That was a radical jump!"culturelanguagestyleChat with AIVocabulary GamePractice Reading
nounπShareThe distance between the front and rear sights of a firearm."The longer the rad of the rifle, the more accurate a marksman can typically be. "weaponmilitarytechnicalChat with AIVocabulary GamePractice Reading