Glossary · Nouns · R
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TermTypeDefinitionClassificationsUpdated
Rnounthe length of a line segment between the center and circumference of a circle or sphereverified
Rabbit BrushnounMWEpleasantly aromatic shrub having erect slender flexible hairy branches and dense clusters of small yellow flowers covering vast areas of western alkali plains and affording a retreat for jackrabbitsverified
Rabbit BushnounMWEpleasantly aromatic shrub having erect slender flexible hairy branches and dense clusters of small yellow flowers covering vast areas of western alkali plains and affording a retreat for jackrabbitsverified
Rabbit FevernounMWEa highly infectious disease of rodents (especially rabbits and squirrels) and sometimes transmitted to humans by ticks or flies or by handling infected animalsverified
Rabbit TestnounMWEpregnancy test that involves injecting some of the woman's urine into an unmated female rabbit and later examining the ovaries of the rabbitverified
Rabbit's-Foot FernnounMWEtropical American fern with brown scaly rhizomes cultivated for its large deeply lobed deep bluish-green frondsverified
Rabbiteyenounshrub of southeastern United States grown commercially especially for canning industryverified
Rabbiteye BlueberrynounMWEshrub of southeastern United States grown commercially especially for canning industryverified
Rabbitweednounlow-growing sticky subshrub of southwestern United States having narrow linear leaves on many slender branches and hundreds of tiny yellow flower headsverified
Rabbitwoodnounshrub of southeastern United States parasitic on roots of hemlocks having sparse spikes of greenish flowers and pulpy drupesverified
Rabble-Rousernouna political leader who seeks support by appealing to popular passions and prejudicesverified
Rabiesnounan acute viral disease of the nervous system of warm-blooded animals (usually transmitted by the bite of a rabid animal)verified
Raccoon DognounMWEsmall wild dog of eastern Asia having facial markings like those of a raccoonverified
Raccoon FoxnounMWEraccoon-like omnivorous mammal of Mexico and the southwestern United States having a long bushy tail with black and white ringsverified
Race ConditionnounMWEA race condition exploits the small window of time between a security control being applied and when the service is used.Vulnerability
Race MeetingnounMWEa regular occasion on which a number of horse races are held on the same trackverified
Race ProblemnounMWEa social and political problem caused by conflict between races occupying the same or adjacent regionsverified
Race RiotnounMWEa riot caused by hatred for one another of members of different races in the same communityverified
Raceaboutnouna small sloop having the keep of a knockabout but with finer lines and carrying more sailverified
Racemenounusually elongate cluster of flowers along the main stem in which the flowers at the base open firstverified
Racemic AcidnounMWEthe optically inactive form of tartaric acid that is often found in grape juiceverified
Racetrack ToutnounMWEsomeone who offers advice about betting on horses (either to influence the odds or in the hope of sharing some of the winnings)verified
Rachetnounmechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one directionverified
Rachisnounthe series of vertebrae forming the axis of the skeleton and protecting the spinal cordverified
Rachitisnounchildhood disease caused by deficiency of vitamin D and sunlight associated with impaired metabolism of calcium and phosphorusverified
Racial DiscriminationnounMWEdiscriminatory or abusive behavior towards members of another raceverified
Racial ProfilingnounMWEa form of racism consisting of the (alleged) policy of policemen who stop and search vehicles driven by persons belonging to particular racial groupsverified
RacializednounA socio-political process by which groups are ascribed a racial identity, whether or not members of the group self-identify as suchverified
Racismnounthe prejudice that members of one race are intrinsically superior to members of other racesverified
Raconnouna device that, on receiving radar signals, transmits coded signals in response to help navigators determine their positionverified
Racquetnouna 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 gamesverified
Radnouna unit of absorbed ionizing radiation equal to 100 ergs per gram of irradiated materialverified
Radarnounmeasuring instrument in which the echo of a pulse of microwave radiation is used to detect and locate distant objectsverified
Radar BeaconnounMWEa device that, on receiving radar signals, transmits coded signals in response to help navigators determine their positionverified
Radar TargetnounMWEa radar echo displayed so as to show the position of a reflecting surfaceverified
Radial ArterynounMWEbranch of the brachial artery beginning below the elbow and extending down the forearm around the wrist and into the palmverified
Radial EnginenounMWEan internal-combustion engine having cylinders arranged radially around a central crankcaseverified
Radial KeratotomynounMWEradial pattern of incisions in the cornea that cause the cornea to bulgeverified