rabato | (noun) a wired or starched collar of intricate lace; worn in 17th century | Synonyms: rebato |
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rabbet | (noun) a rectangular groove made to hold two pieces together | Synonyms: rebate |
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rabbi | (noun) spiritual leader of a Jewish congregation; qualified to expound and apply Jewish law | - |
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rabbinate | (noun) the office or function of a rabbi | - |
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(noun) rabbis collectively | - |
rabbit | (noun) any of various burrowing animals of the family Leporidae having long ears and short tails; some domesticated and raised for pets or food | Synonyms: coney, cony |
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(noun) flesh of any of various rabbits or hares (wild or domesticated) eaten as food | Synonyms: hare |
(noun) the fur of a rabbit | Synonyms: lapin |
rabbiteye | (noun) shrub of southeastern United States grown commercially especially for canning industry | Synonyms: rabbit-eye blueberry, rabbiteye blueberry, Vaccinium ashei |
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rabbitfish | (noun) large European chimaera | Synonyms: Chimaera monstrosa |
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rabbitweed | (noun) low-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower heads | Synonyms: broom snakeroot, broom snakeweed, Gutierrezia sarothrae, rabbit-weed, snakeweed, turpentine weed |
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rabbitwood | (noun) shrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupes | Synonyms: buffalo nut, Pyrularia pubera |
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rabble | (noun) a disorderly crowd of people | Synonyms: mob, rout |
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(noun) disparaging terms for the common people | Synonyms: ragtag, ragtag and bobtail, riffraff |
rabidity | (noun) unrestrained excitement or enthusiasm | Synonyms: madness, rabidness |
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(noun) The property of being very extreme, unreasonable, or fanatical in opinion; excessively zealous; comparable to one with rabies. | - |
rabidness | (noun) unrestrained excitement or enthusiasm | Synonyms: madness, rabidity |
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rabies | (noun) an acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal); rabies is fatal if the virus reaches the brain | Synonyms: hydrophobia, lyssa, madness |
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raccoon | (noun) an omnivorous nocturnal mammal native to North America and Central America | Synonyms: racoon |
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(noun) the fur of the North American racoon | - |
race | (noun) a canal for a current of water | Synonyms: raceway |
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(noun) a contest of speed | - |
(noun) any competition | - |
(noun) people who are believed to belong to the same genetic stock | - |
(noun) (biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species | Synonyms: subspecies |
(noun) the flow of air that is driven backwards by an aircraft propeller | Synonyms: airstream, backwash, slipstream, wash |
raceabout | (noun) a small sloop having the keep of a knockabout but with finer lines and carrying more sail | - |
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racecard | (noun) a program for a race meeting; lists the races and the names of the horses | - |
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racecourse | (noun) a course over which races are run | Synonyms: racetrack, raceway, track |
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racehorse | (noun) a horse bred for racing | Synonyms: bangtail, race horse |
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raceme | (noun) usually elongate cluster of flowers along the main stem in which the flowers at the base open first | - |
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racer | (noun) an animal that races | - |
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(noun) slender fast-moving North American snakes | - |
(noun) a fast car that competes in races | Synonyms: race car, racing car |
(noun) someone who drives racing cars at high speeds | Synonyms: automobile driver, race driver |
racerunner | (noun) very swift lizard of eastern and central United States | Synonyms: Cnemidophorus sexlineatus, race runner, six-lined racerunner |
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racetrack | (noun) a course over which races are run | Synonyms: racecourse, raceway, track |
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raceway | (noun) a canal for a current of water | Synonyms: race |
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(noun) a course over which races are run | Synonyms: racecourse, racetrack, track |
rachet | (noun) mechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one direction | Synonyms: ratch, ratchet |
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rachis | (noun) the series of vertebrae forming the axis of the skeleton and protecting the spinal cord | Synonyms: back, backbone, spinal column, spine, vertebral column |
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(noun) axis of a compound leaf or compound inflorescence | - |
rachischisis | (noun) a not uncommon congenital defect in which a vertebra is malformed; unless several vertebrae are affected or there is myelomeningocele there are few symptoms; can be diagnosed by amniocentesis | Synonyms: schistorrhachis, spina bifida |
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rachitis | (noun) childhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorus | Synonyms: rickets |
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(noun) inflammation of the vertebral column | - |
racialism | (noun) discriminatory or abusive behavior towards members of another race | Synonyms: racial discrimination, racism |
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racialist | (noun) a person with a prejudiced belief that one racial group is superior to others | Synonyms: racist |
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raciness | (noun) behavior or language bordering on indelicacy | Synonyms: gaminess, ribaldry, spiciness |
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(noun) a strong odor or taste property | Synonyms: bite, pungency, sharpness |
racing | (noun) the sport of engaging in contests of speed | - |
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racism | (noun) discriminatory or abusive behavior towards members of another race | Synonyms: racial discrimination, racialism |
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(noun) the prejudice that members of one race are intrinsically superior to members of other races | - |
racist | (noun) a person with a prejudiced belief that one racial group is superior to others | Synonyms: racialist |
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rack | (noun) a rapid gait of a horse in which each foot strikes the ground separately | Synonyms: single-foot |
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(noun) a form of torture in which pain is inflicted by stretching the body | - |
(noun) a support for displaying ot holding various articles | Synonyms: stand |
(noun) an instrument of torture that stretches or disjoints or mutilates victims | Synonyms: wheel |
(noun) the destruction or collapse of something | Synonyms: wrack |
(noun) rib section of a forequarter of veal or pork or especially lamb or mutton | - |
racker | (noun) an attendant who puts pool or billiard balls into a rack | - |
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racket | (noun) an illegal enterprise (such as extortion or fraud or drug peddling or prostitution) carried on for profit | Synonyms: fraudulent scheme, illegitimate enterprise |
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(noun) a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games | Synonyms: racquet |
(noun) the auditory experience of sound that lacks musical quality; sound that is a disagreeable auditory experience | Synonyms: dissonance, noise |
(noun) a loud and disturbing noise | - |
racketeer | (noun) someone who commits crimes for profit (especially one who obtains money by fraud or extortion) | - |
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racketeering | (noun) engaging in a racket | - |
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racketiness | (noun) the auditory effect characterized by loud and constant noise | Synonyms: noisiness |
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racon | (noun) a device that, on receiving radar signals, transmits coded signals in response to help navigators determine their position | Synonyms: radar beacon |
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raconteur | (noun) a person skilled in telling anecdotes | Synonyms: anecdotist |
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racoon | (noun) an omnivorous nocturnal mammal native to North America and Central America | Synonyms: raccoon |
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racquet | (noun) a sports implement (usually consisting of a handle and an oval frame with a tightly interlaced network of strings) used to strike a ball (or shuttlecock) in various games | Synonyms: racket |
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racquetball | (noun) a game played on a handball court with short-handled rackets | - |
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(noun) the ball used in playing the game of racquetball | - |
rad | (noun) a unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated material | - |
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(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: radian |
radar | (noun) measuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objects | Synonyms: microwave radar, radio detection and ranging, radiolocation |
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raddle | (noun) a red iron ore used in dyeing and marking | Synonyms: reddle, ruddle |
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radial | (noun) pneumatic tire that has radial-ply casing | Synonyms: radial-ply tire, radial tire |
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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 |
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radiance | (noun) the quality of being bright and sending out rays of light | Synonyms: effulgence, radiancy, refulgence, refulgency, shine |
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(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 |
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radiation | (noun) the act of spreading outward from a central source | - |
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(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 | - |
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(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 | - |
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(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 | - |
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radicchio | (noun) prized variety of chicory having globose heads of red leaves | - |
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radicle | (noun) (anatomy) a small structure resembling a rootlet (such as a fibril of a nerve) | - |
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radiculitis | (noun) inflammation of the radicle of a nerve | - |
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radio | (noun) a communication system based on broadcasting electromagnetic waves | Synonyms: wireless |
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(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 |
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radiobiologist | (noun) a biologist who studies the effects of radiation on living organisms | - |
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radiobiology | (noun) the branch of biology that studies the effects of radiation on living organisms | - |
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radiocarbon | (noun) a radioactive isotope of carbon | Synonyms: carbon 14 |
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radiochemist | (noun) a chemist who specializes in nuclear chemistry | Synonyms: nuclear chemist |
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radiochemistry | (noun) the chemistry of radioactive substances | Synonyms: nuclear chemistry |
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radiochlorine | (noun) a radioactive isotope of chlorine | - |
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radiocommunication | (noun) medium for communication | Synonyms: radio, wireless |
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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 |
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(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 |
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radiographer | (noun) a person who makes radiographs | - |
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radiography | (noun) photography that uses other kinds of radiation than visible light | - |
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(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 | - |
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radioisotope | (noun) a radioactive isotope of an element; produced either naturally or artificially | - |
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radiolarian | (noun) protozoa with amoeba-like bodies and radiating filamentous pseudopods | - |
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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 |
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radiologist | (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease | Synonyms: radiotherapist |
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radiology | (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation | Synonyms: radioscopy |
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(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 | - |
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radiometer | (noun) meter to detect and measure radiant energy (electromagnetic or acoustic) | - |
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radiomicrometer | (noun) radiometer that is extremely sensitive | - |
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radiopacity | (noun) opacity to X-rays or other radiation | Synonyms: radio-opacity |
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radiopharmaceutical | (noun) pharmaceutical consisting of a radioactive compound used in radiation therapy | - |
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radiophone | (noun) a telephone that communicates by radio waves rather than along cables | Synonyms: radiotelephone, wireless telephone |
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radiophoto | (noun) a photograph transmitted by radio waves | Synonyms: radiophotograph |
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radiophotograph | (noun) a photograph transmitted by radio waves | Synonyms: radiophoto |
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radiophotography | (noun) transmission of photographs by radio waves | - |
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radioprotection | (noun) protection against harmful effects of radiation | - |
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radioscopy | (noun) (radiology) examination of the inner structure of opaque objects using X rays or other penetrating radiation | Synonyms: radiology |
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radiosensitivity | (noun) sensitivity to the action of radiant energy | Synonyms: photosensitivity |
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radiotelegraph | (noun) the use of radio to send telegraphic messages (usually by Morse code) | Synonyms: radiotelegraphy, wireless telegraph, wireless telegraphy |
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(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 |
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(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 |
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(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 |
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radiotherapist | (noun) a medical specialist who uses radioactive substances and X-rays in the treatment of disease | Synonyms: radiologist |
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radiotherapy | (noun) (medicine) the treatment of disease (especially cancer) by exposure to a radioactive substance | Synonyms: actinotherapy, irradiation, radiation, radiation therapy |
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radiothorium | (noun) radioactive isotope of thorium with mass number 228 | Synonyms: thorium-228 |
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radish | (noun) pungent fleshy edible root | - |
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(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 |
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radius | (noun) support consisting of a radial member of a wheel joining the hub to the rim | Synonyms: spoke, wheel spoke |
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(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) | - |