Glossary · Nouns · R
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TermTypeDefinitionClassificationsUpdated
Rat TyphusnounMWEacute infection caused by rickettsia and transmitted by the bite of an infected fleaverified
Rat-A-Tatnouna series of short sharp taps (as made by strokes on a drum or knocks on a door)verified
Rat-A-Tat-Tatnouna series of short sharp taps (as made by strokes on a drum or knocks on a door)verified
Ratafeenounsweet liqueur made from wine and brandy flavored with plum or peach or apricot kernels and bitter almondsverified
Ratafianounsweet liqueur made from wine and brandy flavored with plum or peach or apricot kernels and bitter almondsverified
Ratbite FevernounMWEeither of two infectious diseases transmitted to humans by the bite of a rat or mouseverified
Ratchnounmechanical device consisting of a toothed wheel or rack engaged with a pawl that permits it to move in only one directionverified
Ratchet ScrewdrivernounMWEa screwdriver with a ratchet (so the blade turns in only one direction) and a spiral in the handle (so the blade rotates) with downward pressure on the handleverified
Rate of ExchangenounMWEthe charge for exchanging currency of one country for currency of anotherverified
Rate of InflationnounMWEthe rate of change of prices (as indicated by a price index) calculated on a monthly or annual basisverified
Rate of ReturnnounMWEthe amount returned per unit of time expressed as a percentage of the costverified
ratingnounA classification according to a comparative assessment of quality, standard, or performance.Metric
Rationounthe relation between things with respect to their comparative quantity, magnitude, or degreeverified
Ratiocinationnounthe proposition arrived at by logical reasoning (such as the proposition that must follow from the major and minor premises of a syllogism)verified
Rationalenoun(law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)verified
Rationalisationnoun(mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equationverified
Rationalismnounthe theological doctrine that human reason rather than divine revelation establishes religious truthverified
Rationalizationnoun(mathematics) the simplification of an expression or equation by eliminating radicals without changing the value of the expression or the roots of the equationverified
Ratitenounflightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostrichesverified
Ratite BirdnounMWEflightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostrichesverified
Rattail CactusnounMWEcommonly cultivated tropical American cactus having slender creeping stems and very large showy crimson flowers that bloom for several daysverified
Rattannounclimbing palm of Sri Lanka and southern India remarkable for the great length of the stems which are used for malacca canesverified
Rattan CanenounMWEthe stem of various climbing palms of the genus Calamus and related genera used to make wickerwork and furniture and canesverified
Rattan PalmnounMWEclimbing palm of Sri Lanka and southern India remarkable for the great length of the stems which are used for malacca canesverified
Ratternouna disloyal person who betrays or deserts his cause or religion or political party or friend etc.verified
Rattingnounto furnish incriminating evidence to an officer of the law, usually in return for favorsverified
Rattle-TopnounNorth American bugbane found from Maine and Ontario to Wisconsin and south to Georgiaverified
Rattleboxnounany of various plants of the genus Crotalaria having inflated pods within which the seeds rattleverified
Rattlesnake MasternounMWEcoarse prickly perennial eryngo of United States thought to cure rattlesnake biteverified
Rattlesnake OrchidnounMWEany of various orchids of the genus Pholidota having numerous white to brown flowers in spiraling racemes clothed in slightly inflated bracts and resembling a rattlesnake's tailverified
Rattlesnake PlantainnounMWEany of several small temperate and tropical orchids having mottled or striped leaves and spikes of small yellowish-white flowers in a twisted racemeverified
Rauvolfianounany shrub or small tree of the genus Rauwolfia having leaves in whorls and cymose flowersverified
Rauwolfianounany shrub or small tree of the genus Rauwolfia having leaves in whorls and cymose flowersverified
Ravenalanoungiant treelike plant having edible nuts and leafstalks that yield a refreshing drink of clear watery sapverified
Ravigotenounveloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capersverified
Ravigottenounveloute sauce seasoned with chopped chervil, chives, tarragon, shallots and capersverified