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53 Nouns That Start With RADI

Part of Speech:
Word Definitions Synonyms
radial (noun) pneumatic tire that has radial-ply casing Synonyms: radial-ply tire, radial tire
radian (noun) the unit of plane angle adopted under the Systeme International d'Unites; equal to the angle at the center of a circle subtended by an arc equal in length to the radius (approximately 57.295 degrees) Synonyms: rad
radiance (noun) the quality of being bright and sending out rays of light Synonyms: effulgence, radiancy, refulgence, refulgency, shine
(noun) the amount of electromagnetic radiation leaving or arriving at a point on a surface Synonyms: glow, glowing
(noun) an attractive combination of good health and happiness
radiancy (noun) the quality of being bright and sending out rays of light Synonyms: effulgence, radiance, refulgence, refulgency, shine
radiation (noun) the act of spreading outward from a central source
(noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance Synonyms: actinotherapy, irradiation, radiation therapy, radiotherapy
(noun) a radial arrangement of nerve fibers connecting different parts of the brain
(noun) the spread of a group of organisms into new habitats
(noun) energy that is radiated or transmitted in the form of rays or waves or particles
(noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay Synonyms: radioactivity
(noun) syndrome resulting from exposure to ionizing radiation (e.g., exposure to radioactive chemicals or to nuclear explosions); low doses cause diarrhea and nausea and vomiting and sometimes loss of hair; greater exposure can cause sterility and cataracts and some forms of cancer and other diseases; severe exposure can cause death within hours Synonyms: radiation sickness, radiation syndrome
radiator (noun) a mechanism consisting of a metal honeycomb through which hot fluids circulate; heat is transferred from the fluid through the honeycomb to the airstream that is created either by the motion of the vehicle or by a fan
(noun) heater consisting of a series of pipes for circulating steam or hot water to heat rooms or buildings
(noun) any object that radiates energy
radical (noun) a character conveying the lexical meaning of a logogram
(noun) (linguistics) the form of a word after all affixes are removed Synonyms: base, root, root word, stem, theme
(noun) a person who has radical ideas or opinions
(noun) (mathematics) a quantity expressed as the root of another quantity
(noun) (chemistry) two or more atoms bound together as a single unit and forming part of a molecule Synonyms: chemical group, group
(noun) an atom or group of atoms with at least one unpaired electron; in the body it is usually an oxygen molecule that has lost an electron and will stabilize itself by stealing an electron from a nearby molecule Synonyms: free radical
radicalism (noun) the political orientation of those who favor revolutionary change in government and society
radicchio (noun) prized variety of chicory having globose heads of red leaves
radicle (noun) (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve)
radiculitis (noun) inflammation of the radicle of a nerve
radio (noun) a communication system based on broadcasting electromagnetic waves Synonyms: wireless
(noun) an electronic receiver that detects and demodulates and amplifies transmitted signals Synonyms: radio receiver, radio set, receiving set, tuner, wireless
(noun) medium for communication Synonyms: radiocommunication, wireless
radioactivity (noun) the spontaneous emission of a stream of particles or electromagnetic rays in nuclear decay Synonyms: radiation
radiobiologist (noun) a biologist who studies the effects of radiation on living organisms
radiobiology (noun) the branch of biology that studies the effects of radiation on living organisms
radiocarbon (noun) a radioactive isotope of carbon Synonyms: carbon 14
radiochemist (noun) a chemist who specializes in nuclear chemistry Synonyms: nuclear chemist
radiochemistry (noun) the chemistry of radioactive substances Synonyms: nuclear chemistry
radiochlorine (noun) a radioactive isotope of chlorine
radiocommunication (noun) medium for communication Synonyms: radio, wireless
radiogram (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) Synonyms: radiograph, shadowgraph, skiagram, skiagraph
(noun) a message transmitted by wireless telegraphy
radiograph (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) Synonyms: radiogram, shadowgraph, skiagram, skiagraph
radiographer (noun) a person who makes radiographs
radiography (noun) photography that uses other kinds of radiation than visible light
(noun) the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light Synonyms: skiagraphy
radioimmunoassay (noun) immunoassay of a substance that has been radioactively labeled
radioisotope (noun) a radioactive isotope of an element; produced either naturally or artificially
radiolarian (noun) protozoa with amoeba-like bodies and radiating filamentous pseudopods
radiolocation (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects Synonyms: microwave radar, radar, radio detection and ranging
radiologist (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease Synonyms: radiotherapist
radiology (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation Synonyms: radioscopy
(noun) the branch of medical science dealing with the medical use of X-rays or other penetrating radiation
radiolysis (noun) molecular disintegration resulting from radiation
radiometer (noun) meter to detect and measure radiant energy (electromagnetic or acoustic)
radiomicrometer (noun) radiometer that is extremely sensitive
radiopacity (noun) opacity to X-rays or other radiation Synonyms: radio-opacity
radiopharmaceutical (noun) pharmaceutical consisting of a radioactive compound used in radiation therapy
radiophone (noun) a telephone that communicates by radio waves rather than along cables Synonyms: radiotelephone, wireless telephone
radiophoto (noun) a photograph transmitted by radio waves Synonyms: radiophotograph
radiophotograph (noun) a photograph transmitted by radio waves Synonyms: radiophoto
radiophotography (noun) transmission of photographs by radio waves
radioprotection (noun) protection against harmful effects of radiation
radioscopy (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation Synonyms: radiology
radiosensitivity (noun) sensitivity to the action of radiant energy Synonyms: photosensitivity
radiotelegraph (noun) the use of radio to send telegraphic messages (usually by Morse code) Synonyms: radiotelegraphy, wireless telegraph, wireless telegraphy
(noun) telegraphy that uses transmission by radio rather than by wire Synonyms: radiotelegraphy, wireless telegraphy
radiotelegraphy (noun) the use of radio to send telegraphic messages (usually by Morse code) Synonyms: radiotelegraph, wireless telegraph, wireless telegraphy
(noun) telegraphy that uses transmission by radio rather than by wire Synonyms: radiotelegraph, wireless telegraphy
radiotelephone (noun) a telephone that communicates by radio waves rather than along cables Synonyms: radiophone, wireless telephone
(noun) telephony that uses transmission by radio rather than by wire Synonyms: radiotelephony, wireless telephone
radiotelephony (noun) telephony that uses transmission by radio rather than by wire Synonyms: radiotelephone, wireless telephone
radiotherapist (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease Synonyms: radiologist
radiotherapy (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance Synonyms: actinotherapy, irradiation, radiation, radiation therapy
radiothorium (noun) radioactive isotope of thorium with mass number 228 Synonyms: thorium-228
radish (noun) pungent fleshy edible root
(noun) Eurasian plant widely cultivated for its edible pungent root usually eaten raw Synonyms: Raphanus sativus
(noun) pungent edible root of any of various cultivated radish plants
(noun) radish of Japan with a long hard durable root eaten raw or cooked Synonyms: daikon, Japanese radish, Raphanus sativus longipinnatus
(noun) a cruciferous plant of the genus Raphanus having a pungent edible root Synonyms: radish plant
radium (noun) an intensely radioactive metallic element that occurs in minute amounts in uranium ores Synonyms: atomic number 88, Ra
radius (noun) support consisting of a radial member of a wheel joining the hub to the rim Synonyms: spoke, wheel spoke
(noun) the length of a line segment between the center and circumference of a circle or sphere Synonyms: r
(noun) the outer and slightly shorter of the two bones of the human forearm
(noun) a circular region whose area is indicated by the length of its radius
(noun) a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
radix (noun) (numeration system) the positive integer that is equivalent to one in the next higher counting place Synonyms: base

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