Other Ending Letters

Word Lengths Starting With R

All 2000 Matching Words

rabbinDated form of rabbi.rabbitskinThe skin of a rabbit.rabdolatifolin(organic chemistry) A diterpenoid found in Rabdosia umbrosa var. latifolia.rabelomycin(organic chemistry) The angucycline antibiotic (3R)-3,6,8-trihydroxy-3-methyl-2,4-dihydrobenzo[a]anthracene-1,7,12-trioneraccoonThe common raccoon (Procyon lotor).racecationA vacation consisting mainly of visiting race venues.racemationA cluster or bunch, as of grapes.racemethorphan(pharmacology) The racemic mixture of dextromethorphan and levomethorphan.racemisationAlternative spelling of racemization.racemization(organic chemistry, physical chemistry) The formation of a racemate from a pure enantiomer.racemorphanThe racemic mixture of the two stereoisomers of 17-methylmorphinan-3-ol: dextrorphan and levorphanol.rachidianAlternative spelling of rhachidian.rachiglossan(zoology, obsolete) Any member of the Rachiglossa, a former classification that included a number of carnivorous marine neogastropod families.racialisationNon-Oxford British English standard spelling of racialization.racializationThe act or process of racializing, that is, of treating (a relationship, practice, person or group) in racial terms or of constituting (that person or group) as racial or as a race.raciationThe division of people or other organisms into races.racization(sociology) The way in which race becomes defined.rackan(UK dialectal, Northern England) A chain or bar drilled with holes to accommodate pot-hooks from which cooking vessels can be suspended over a fire; a pot-hook.raconA beacon that, on detecting a radar signal, responds by transmitting a coded navigation signal.racoonAlternative spelling of raccoon.radarmanA radar operator.radarmenplural of radarmanraddlemanAlternative spelling of ruddleman.radenplural of raadradeon(obsolete) Obsolete form of radon (“radon-222”); an isotope of radon.radialisationAlternative form of radialization.radializationArrangement in a radial patternradian(geometry) In the International System of Units, the derived unit of plane angle: the angle subtended at the centre of a circle by an arc of its circumference equal in length to the radius of the circle.radiationThe shooting forth of anything from a point or surface, like diverging rays of light.radicalisationNon-Oxford British English standard spelling of radicalization.radicalizationThe process of radicalizing.radicarian(archaic) Relating to roots.radicationThe process of taking root, or state of being rooted.radioablationablation (of cancer tissue) by means of radiofrequency radiationradioactivationThe conversion of something into a radioactive form.radioadaptation(biology) adaptation to ionizing radiationradioargonradioactive argonradiobeaconAlternative form of radio beacon.radioboronradioactive boronradiocarbonA radioactive isotope of carbon, especially 146C.radiochemosensitizationSynonym of chemosensitization.radiochromatoscanAn image produced by a radiochromatoscannerradiocommunicationAny means of communication using radio or other electromagnetic wavesradiocomplexation(chemistry) The formation of a radiocomplexradioconcentrationconcentration of a radioisotoperadioconductionAn increase in electric conduction induced by radio waves, exploited in the coherer.radiocontaminationradioactive or radiological contaminationradiodefluorinationThe removal of radiofluorineradiodetectionThe detection of underground electric cables (via the radio waves produced by alternating current)radiodeterminationDetermination of the position, velocity, or other characteristics of an object by means of radio wavesradiodiffusion(uncountable) The act of broadcasting by radio; transmission.radioembolisationAlternative form of radioembolization.radioembolization(surgery) A form of internal radiotherapy in which small radioactive particles are surgically implantedradiofluorination(chemistry) fluorination using radiofluorineradiohalogen(chemistry, physics) Any radioactive isotope of a halogenradiohalogenation(chemistry, physics) The labelling of a material with a radiohalogen.radiohydrogenradioactive hydrogenradioimmunoconjugation(immunology) The creation of a radioimmunoconjugateradioimmunodetectionAn imaging technique using radiolabeled antibodies.radioimmunodiffusion(biology) immunodiffusion using antigens or antibodies labelled with radioisotopesradioimmunoprecipitation(immunology) immunoprecipitation using antigens or antibodies labelled with radioisotopesradioimmunoproteinradiolabelled immunoproteinradioinfusion(medicine) infusion (perfusion) with a radioisotoperadioiodination(chemistry) The incorporation of any radioiodine into a compound or tissue.radioiododestannylation(organic chemistry) An iododestannylation reaction using radioiodineradioironA radioactive isotope of iron.radiokryptonradioactive kryptonradiolarianAny of many marine amoeboid protozoa, of subclass Radiolaria, having filamentous pseudopodia; they have intricate silica skeletons.radiolesionAny lesion produced by ionizing radiation.radiolocalizationlocalization, typically of a tumour, by means of a radioactive tracerradiolocation(uncountable) The detection and locating of distant objects using microwave radiation; especially radarradiomanA person who operates a radio transceiver, especially when a title or position in a crew.radiomitigationMitigation of the harmful effects of radiation.radiomodulation(genetics) modulation by ionizing radiationradiomutation(genetics) A genetic mutation due to the effects of ionizing radiationradion(physics) The radius modulus of an extra dimension in a compactification. Coined in 1998 by Nima Arkani-Hamed, Savas Dimopoulos, and John March-Russell in the paper "Stabilization of Sub-Millimeter Dimensions: The New Guise of the Hierarchy Problem".radionavigationRadio navigation; navigation using radio signals to provide positional information.radioneonradioactive neonradionitrogenradioactive nitrogen (especially when used as a tracer)radiooxygenradioactive oxygenradiopacificationThe process of making something radiopaque.radiopasteurizationpasteurization by exposure to ionizing radiationradioprotectionAny form of protection against the harmful effects of ionizing radiation, especially caused by artificial sources.radiopticon(historical) A kind of projector or magic lantern that did not require slides.radioracemization(physics, chemistry) racemization under the influence of ionizing radiation.radioscanA scan for the presence of radioactive material in a sample; especially for a radioactive tracer in an organradiosensitisationAlternative spelling of radiosensitization.radiosensitization(medicine) treatment of a tumour with radiant heat in order to make it more susceptible to radiation treatmentradiosiliconradioactive siliconradiostationAlternative form of radio station.radiosterilisationAlternative form of radiosterilization.radiosterilization(medicine) The sterilization (either of an organism, or a surgical implement) by ionizing radiation such as X-rays or gamma rays.radiosuppressionThe suppression of radio and TV interference from the ignition system of a motor vehicleradiotelecommunicationtelecommunication by means of radioradiothon(informal) An extended charity appeal on the radioradiotinradioactive tinradiotoxinAny radiotoxic substance.radiotransmissionTransmission or sending a radio signal from a radio transmitter.radiotrician(dated) A technician who builds or repairs radios.radiotungstenradioactive tungstenradiovision(historical) An early television system.radioxenonradioactive xenonradiozoan(rare) Synonym of radiolarian.radiumizationThe act of treating something with radium.radixinA protein coded for by the gene.radman(historical) A kind of feudal tenant in England who served on horseback.radonRadon-222 (22286Rn), the most stable isotope of said element.rafampacinMisspelling of rifampicin.raffinationThe process of the result of raffinatingraftmanA man who steers a raft.raftsmanA person who transports a raft of floating logs downstream to a sawmill; a rafter.raftswomanA female raftsman.ragamuffinA dirty, shabbily-clothed child; an urchin.raggamuffin(originally Jamaica) Alternative spelling of ragamuffin.raghorn(US, informal) Any male elk (bull) with antlers between one and six points, non-inclusive, on either side. Also called an "intermediate bull" (bulls with two, three, four or five points on either side).raglan(of a sleeve) Being or having a kind of sleeve that continues in one piece up to the neck of a garment, without a shoulder seam.ragmanA person who collects and sells unwanted household items such as rags and other refuse for a living, a rag and bone man.rahn(Bermuda) Pronunciation spelling of round.raignObsolete spelling of rain.railfan(US) A railway enthusiast.railgunAn electromagnetic gun that uses a large electrical current to propel a projectile down a track of two parallel conductive rails.railmanA man who works on a railway.railwagonSynonym of railroad car.railwaymanA man who works on a railway.railwaymenplural of railwaymanrailwaywoman(rail transport) A woman who works on a railway.railwomanA woman who works on a railway.rain(meteorology) Condensed water falling from a cloud.rainburn(humorous) A notional burn on the skin caused by excess exposure to heavy rain.rainforestationThe conversion of a habitat to rainforest.raingardenAlternative form of rain garden.rainscreenSynonym of rainshade.raionAn administrative unit of some Eastern European and Asian states.rajamuffin(slang, uncommon) Synonym of Raggastani.rajonAlternative spelling of raion.rakan(Buddhism) A Japanese arhat.raloxifenAlternative form of raloxifene.ramakinAlternative form of ramekin.ramatrobanA thromboxane receptor antagonist used in treating coronary artery disease and asthma.rambootanObsolete spelling of rambutan.rambostanObsolete form of rambutan.rambunction(nonstandard) A rambunctious activity.rambutanA tree of species Nephelium lappaceum, of Southeast Asia.ramekin(cooking) A small glass or earthenware dish, often white and circular, in which food is baked and served.ramelteonA particular drug used to treat insomnia.ramenSoup noodles of wheat, with various ingredients (Japanese-Chinese style).ramequinArchaic form of ramekin.ramicorn(zoology) One of several horny pieces on the sides of a bird's lower beak.ramification(mathematics) An arrangement of branches.rammermanA member of the navy employed to operate a ramming device that pushes a projectile into the gun barrel.ramnificationMisspelling of ramification.ramnogalacturonanMisspelling of rhamnogalacturonan.ramogenA material that causes an organism to become ramoseramoonThe ramoon-treeramoplaninA glycolipodepsipeptide antibiotic drug derived from Actinoplanes.ramosetron(pharmacology) A serotonin receptor antagonist for the treatment of nausea and vomiting.rampallian(obsolete) A mean wretch; a low person.rampionA species of bellflower with roots and leaves formerly used in salads, Campanula rapunculus.rampsman(slang, obsolete) A highway robber.ramscallionAlternative form of rapscallion.ramshorn(fortifications) A low semicircular work situated in and commanding a ditch.ramskinThe skin of a ram.ramsonA plant, Allium ursinum, a wild relative of chives and garlic.ramyeonRamen (Korean style).ramyunAlternative spelling of ramyeon (“Korean instant noodles”).ransimple past of runranalexinAn antimicrobial peptide present in the skin of the bullfrog Rana catesbeianaranarianof, relating to, or resembling frogs.ranaspumin(biochemistry) A surfactant protein found in the foam nests of tropical frogs.rancelman(historical) A kind of constable in Orkney and Shetland, responsible for investigating minor crimes.ranchmanAn owner or occupant of a ranchranchmenplural of ranchmanranchwomanThe female equivalent of a ranchman.rancidificationThe decomposition of fats and other lipids by hydrolysis or oxidation; the process of becoming rancid.randan(Scotland) Riotous or disorderly behaviour.randistirionAlternative spelling of rantistirion.randomisation(British) Alternative spelling of randomization.randomizationThe process of making random.randonObsolete form of random.rangemanA man who lives on the range.rangoon(cooking) A deep-fried dumpling in American Asian cuisine, stuffed with a specified ingredient (typically crab).raniseptinAny of a group of antimicrobial peptides present in the skin of the anuran Hypsiboas ranicepsranken(rare, ambitransitive) To make or become rankranksmanA common soldier, one deployed in the rank and file.rannA stanza of Irish poetry.ranselmanAlternative form of rancelman.rantallion(slang) A person whose scrotum is so relaxed as to hang so low as to exceed the length of the flaccid penisrantistirion(Eastern Orthodoxy) A ritual sprinkler used in some Christian rites.ranunculinAn unstable glucoside found in plants of the buttercup family (Ranunculaceae). On maceration, it is enzymatically broken down into glucose and the toxin protoanemonin.rapamycin(pharmacology) Alternative form of sirolimus.rapconAlternative letter-case form of RAPCON.rapehon(4chan slang, LGBTQ slang, derogatory) A trans woman who does not pass as a woman and acts in a perverted or rapey way.raphanin(biochemistry) The main sulfur component found in radish seeds of Raphanus sativus and in broccoli and red cabbage.raphidianOf or relating to raphides.raphidophyceanSynonym of raphidophyte.rappenA unit of currency in Switzerland and Liechtenstein, equal to one-hundredth of a Swiss franc.rapscallionDisreputable, roguish.rapsyn(biochemistry) A protein believed to play a role in anchoring or stabilizing the nicotinic acetylcholine receptor at synaptic sites.rarefactionA reduction in the density of a material, especially that of a fluid.rarificationAlternative form of rarefaction.rarowcunObsolete spelling of raccoon.rascalionArchaic spelling of rapscallion.rascallionArchaic form of rapscallion.rasion(archaic) The act of scraping.rasterisationAlternative spelling of rasterization.rasterizationThe process of taking an image described in a vector graphics format (shapes) and converting it into a raster image.ratanAlternative form of rattan.rataplanA continuous, even drumming or rapping, as of the hooves of a galloping horse, or machine-gun fire.rateenAlternative form of ratteen.ratificationThe act or process of ratifying, or the state of being ratified.ratihabition(obsolete, law) confirmation or approbation, as of an act or contractratiocinationReasoning, conscious deliberate inference; the activity or process of reasoning.rationA portion of some limited resource, especially food, allocated to a person or group.rationalification(mathematics, physics) Conversion to rational formrationalisationNon-Oxford British English standard spelling of rationalization.rationalization(now rare) The process or result of rationalizing, or expressing in rational terms.ratlin(nautical) Alternative form of ratline.ratmageddon(informal) A disaster caused by or involving rats.ratoonA shoot sprouting from the root of a cropped plant, especially sugar cane.ratskinThe hide of a rat.rattanAny of several species of climbing palm of the genus Calamus.ratteen(archaic) A thick, coarse, woolen twill.ratten(rare) Alternative form of ratton.rattlebrainA rattlebrained person.rattlin(nautical) Alternative form of ratline.ratton(now Northern England, Scotland, Ireland) A rat.rattoonAlternative spelling of ratoon (“rattan cane”).rauisuchian(paleontology) An extinct reptile of the taxon Rauisuchia, which lived during the Triassic.raundonObsolete spelling of random.ravanastronSynonym of ravanahatha.ravelinAn outwork. A fortification outside a castle used to split an attacking force; composed of two faces, forming a salient angle whose gorge resembles a half-moonraven(countable, figurative, obsolete) A person who brings bad news or makes pessimistic predictions.ravin(countable, uncountable) Property obtained or seized by force or violence; booty, plunder, spoils.raygun(science fiction, weaponry) Alternative spelling of ray gun.rayonA manufactured regenerated cellulosic fiber.reabandon(transitive) To abandon again.reablation(medicine, surgery, uncountable) The act of reablating.reabolitionThe act of abolishing something again.reabsorption(physics) The subsequent absorption of emitted radiation.reaccelerationA second or subsequent acceleration.reaccentuationThe process or result of reaccentuating.reaccessionaccession againreacclimationA second or subsequent acclimationreacclimatizationThe process of reacclimatizing.reaccommodationA second or subsequent accommodationreaccomodationMisspelling of reaccommodation.reaccreditationaccreditation againreaccretionaccretion againreacculturationThe process of reacculturating.reaccumulationA second or subsequent accumulationreaccusationA second or subsequent accusation.reacetylationacetylation following a previous deacetylationreacidificationThe process of reacidifyingreacquisitionA second or subsequent acquisition.reactionAn action or statement in response to a stimulus or other event.reactivationThe activation of something previously inactive or inactivated.reactualizationThe process of reactualizing.reacylationA second or subsequent acylationreadaptationA second or subsequent adaptation.readathonAn event during which people read books in order to raise money for charity.readdictionAddiction again, especially to an illicit drug.readditionA second or subsequent addition, especially following removalreadenylationA second or subsequent adenylation, especially one following deadenylation.readeption(obsolete) A regaining; recovery of something lost.readhesionA second, or subsequent adhesion, especially following deadhesionreadjournTo adjourn again.readjudicationadjudication again.readministrationThe act of administering again.readmissionA second or subsequent admission.readoptionBeing adopted back into a family or groupreadorn(transitive) To adorn again.readsorptionThe adsorption of a material that was previously removed from a surfacereaerationaeration again or anewreaerosolizationA second or subsequent aerosolizationreafferentationThe restoration of an afferent connection to the central nervous system, typically following deafferentationreaffiliationaffiliation again or anewreaffirmationAn act of reaffirming; a second or subsequent affirmation.reafforestationreforestationreagglomerationagglomeration following a previous dispersalreaggravationThe state or act of reaggravating.reaggregationaggregation again or anewreagin(biochemistry) An antibody.reagitationThe act of reagitating.reagudization(rare) Synonym of exacerbation.realcompactificationThe compactification to a realcompact space.realienationThe process of realienating.realign(transitive) To bring back into alignment.realimentationalimentation after a period of fastingrealisation(British spelling) Alternative spelling of realization.realizationThe act of realizing, as:realkalinisationAlternative spelling of realkalinization.realkalinizationA second or subsequent alkalinization, especially following dealkalinizationrealkalisationAlternative spelling of realkalization.realkalizationalkalization of steel following reaction with carbon dioxide in concretereallegationA second or subsequent allegation.reallocationThe act of reallocating; a second or subsequent allocation.realphabetizationThe process of realphabetizing.realpoliticianA realpolitiker.realterationalteration againrealveolarizationA second or subsequent alveolarization.reamalgamationThe process or result of reamalgamating.reambulationA period of walking after a period of restreamidation(organic chemistry) The repeat of amidation.reaminationA second or subsequent amination, especially one following deaminationreamplificationrepeated amplificationreamputation(surgery) A second amputation performed upon the same body part.reanA deep furrow used for drainage.reanimationThe act of reanimating; a second or subsequent animation.reannexationThe act of reannexing; a subsequent annexation.reannihilationA second or subsequent annihilation.reannotationA second or subsequent annotation.reapparitionSynonym of reappearance.reapplicationThe act of reapplying; a second or subsequent application.reapportionTo apportion again; to redistribute or reallocate.reappositionA second or subsequent appositionreappreciationAppreciation again or anew.reapprobationSynonym of reapproval.reappropriationThe act or process of reappropriating.reapproximation(medicine) The process of reapproximating.rearbitrationArbitration again.rearomatization(organic chemistry) Any reaction in which an aromatic compound that had been converted into a non-aromatic one is reconverted to an aromatic one.rearraignTo arraign again.rearterializationSubsequent arterializationrearticulationThe process, or the result of rearticulating.reascensionThe act of reascending; a second or subsequent ascension.reascertainTo ascertain againreaspirationA second or subsequent aspirationreassertionthe act of reasserting; a second or subsequent assertionreasseverationThe act of reasseverating.reassign(transitive) To assign again or anew.reassimilationA second or subsequent assimilationreassociationA repeat association.reassortation(rare) A second or subsequent assortationreassumptionAssumption again or anew.reattainTo attain again.reattenuationThe process of reattenuating.reattractionAttraction again or anew.reattributionThe act of attributing again.reauction(transitive) To auction again.reauditionTo audition again.reaugmentationA second or subsequent augmentationreauthenticationauthentication againreauthorisationAlternative form of reauthorization.reauthorizationA second or subsequent authorization.reawaken(intransitive) To wake after an extended period of sleep.rebaccamycinMisspelling of rebeccamycin.reban(transitive) To ban again.rebaptisation(obsolete) A second baptism.rebaptizationAlternative form of rebaptisation.rebarbarizationAn act which causes people revert again to a state which is primitive and uncivilized.rebargain(transitive) To arrange (a deal or bargain) again or differently.rebavirinMisspelling of ribavirin.rebbetzin(Judaism) The wife of a rabbi.rebeccamycinA particular antitumor drug.rebegansimple past of rebeginrebegin(ambitransitive) To begin again.rebellion(uncountable) Armed resistance to an established government or ruler.rebifurcationThe process of bifurcating again.rebin(statistics, transitive) To divide (data) into a different set of bins, or interval groupings.rebinarizationA second or subsequent binarizationreblackenTo blacken again.reblazonTo blazon anew.reblochonA soft French cow's-milk cheese from the Alpine region of Savoie.reboationA loud reverberation; the echo of a bellow or roar.reboisation(Indonesia) Reforestation.rebornRevived or regenerated, especially emotionally or spiritually.rebrominationThe act of rebrominating.rebullition(obsolete) The act of boiling up or effervescing.reburden(transitive) To burden again.reburgeonTo burgeon again.rebutton(transitive) To fasten with buttons again.recaffeinationThe act of recaffeinating.recalcification(medicine, dentistry) The restoration of calcium or calcium compounds to a tissue that is decalcified.recalcinationThe act or process of calcining again.recalcitrationopposition, repugnance, or unwillingness to follow rules or obey.recalculationThe act of recalculating; a second or subsequent calculation.recalibrationA second, subsequent or corrected calibration.recampaign(intransitive) To campaign again.recan(transitive) To can (package in a can) again or anew.recanalisationthe act of recanalisingrecanalizationAlternative spelling of recanalisation.recancellationThe act of cancelling again.recannulation(surgery) A second or subsequent cannulationrecanonizationThe process of recanonizing.recantationThe act of recanting or something recanted.recapillarizationThe restoration of a network of capillaries to a part of the bodyrecapitalisationAlternative spelling of recapitalization.recapitalization(finance) A restructuring of a company's mixture of equity and debtrecapitulationA subsequent brief recitement or enumeration of the major points in a narrative, article, or book.recaption(law) The lawful claim and recovery, by a person, of goods wrongly taken from himrecaptivationcaptivation again or anewrecarbonationThe act of carbonating again.recarbonisationAlternative form of recarbonization.recarbonizationThe act or process of recarbonizing.recarboxylation(organic chemistry) A second or subsequent carboxylation, typically following decarboxylationrecarburisationAlternative form of recarburization.recarburizationThe process or act of recarburizing.recategorisationAlternative spelling of recategorization.recategorizationThe act of recategorizingrecatheterizationA second or subsequent catheterization.recatholicizationThe act of making a person or region Catholic again.recatholizationThe process of converting (a territory, etc.) back to the Catholic religion.recationA vacation from the routine of retirementrecauterizationThe act of cauterizing again.recelebrationcelebration again or anewrecellularizationRenewed cellularization following decellularizationrecementationA second or subsequent cementation (typically of a dental crown)recensionA census, an enumeration, a review, a survey.recentralisation(British spelling) Alternative spelling of recentralization.recentralizationThe return of devolved powers to a central authorityrecentrifugationcentrifugation againreceptionThe act of receiving.recertificationThe act or process of recertifying.recessionThe act or an instance of receding or withdrawing.rechainTo chain againrechannelization(road transport) Synonym of road dietrecharacterisationAlternative form of recharacterization.recharacterizationThe assignment of a new character or personality to something.rechasten(transitive) To chasten again.rechristen(transitive) To christen or baptize again.rechristianizationThe process of rechristianizing.rechurn(transitive) To churn again.recidivationRelapse of a disease or a symptom.reciliation(cytology) The reformation of cilia in a damaged ciliate cell.reciprocalization(grammar) The process of reciprocalizing.reciprocationThe act of reciprocating; interchange of acts; a mutual giving and returning.reciprocitarianOne who believes that trading should take the form of a reciprocal relationship, with the same conditions on each side.recircularisationAlternative spelling of recircularization.recircularizationThe restoration of circularity (especially of a plasmid).recirculationThe act or process of recirculating.recircumcisionCircumcision that is performed again.recircumscriptionA second or subsequent circumscriptionrecisionThe act of cutting off.recissionAlternative spelling of rescission.recitationThe act of publicly reciting something previously memorized.reckonTo count; to enumerate; to number; also, to compute; to calculate.reclamationThe act of reclaiming or the state of being reclaimed.reclarificationA repeat instance of clarification.reclassificationThe act of reclassifying; a second or subsequent classification.reclean(transitive) To clean again.reclinationThe act of leaning or reclining.reclusionLife as a recluse.recoagulationThe process of coagulating again.recoarctationA second or subsequent coarctationrecoctionA second coction or preparationrecodificationcodification againrecodonization(genetics) The replacement or reattachment of a terminal codon to a generecoffin(transitive) To place in a coffin again.recognin(biochemistry, immunology) Any of a group of polypeptide antigens (protein fragments), produced from cancer cells, that are capable of recognizing some other specific types of cellrecognisition(nonstandard, uncommon) Non-Oxford British English standard spelling of recognizition.recognitionAcceptance as valid or true.recognizationA process or act of recognizing.recognizition(nonstandard, uncommon) Recognition.recoin(transitive) To coin (money, or an expression) again.recollateralization(finance) A second or subsequent collateralization.recollationThe process of collating again or differently.recollectionThe act of recollecting, or recalling to the memory; the act of recalling to memory.recollimation(physics, of a beam) collimation subsequent to broadeningrecollision(physics) A repeat collision between two particles (such as an electron and an ion) which have collided before.recolonisationAlternative spelling of recolonization.recolonizationThe act of recolonizing; a second or subsequent colonization.recolorationAct of recoloring.recolorizationThe process or result of recolorizing.recolourationAct of recolouring.recombinationCombination a second or subsequent time.recombobulationThe act of recombobulating; putting back into order; removing confusion.recombustioncombustion againrecommendationAn act of recommending.recommission(transitive) To give a new commission or to validate an existing commission.recommodificationAct or process of recommodifying.recommunicationcommunication againrecompactionThe process of compacting something again.recomparisonThe act of comparing again.recompartmentalizationA second or subsequent compartmentalizationrecompensation(sometimes proscribed) Synonym of compensation.recompilationThe act or process of recompiling.recomplementationThe condition of being recomplementedrecompletion(uncountable) The act of completing again.recomplicationComplication again or anew.recompositionA composition again or anew; the process or result of recomposingrecompressionThe act of recompressing; compression again.recomputationThe act, process or result of recomputing; recalculation.recon(genetics) The smallest genetic unit that is capable of undergoing recombination.reconcatenationA second or subsequent concatenation.reconcentrationA second or subsequent concentration.reconceptionA new conception or way of conceiving somethingreconceptualisationAlternative spelling of reconceptualization.reconceptualizationThe act or process of reconceptualizing, of developing a new concept for somethingreconciliationThe re-establishment of friendly relations; conciliation, rapprochement.reconcoctionThe act of concocting again.recondemn(transitive) To condemn again.recondemnationA second or subsequent condemnation.recondensationThe condensation of a vapour following evaporation or distillation.reconditionTo restore to a functional state, or to a condition resembling the original.reconductionRepeat undertaking or restoration.reconfigurationA reconfigured state.reconfirmationThe act of reconfirming; a second or subsequent confirmation.reconfiscationThe act of confiscating again.reconflationThe act of reconflating.reconfrontationThe act of confronting again.reconjoinTo join or conjoin again.reconjugation(genetics, biology) A second or subsequent conjugationreconnectionA connection of things that have been previously severed.reconnexion(chiefly British) Dated spelling of reconnection.reconscriptionThe act of conscripting again.reconsecrationThe act of reconsecrating; a second or subsequent consecration.reconservation(of works of art) Conservation or repair subsequent to a previous attempt at conservation.reconsiderationThe act of reconsidering or something reconsidered.reconsignConsign again.reconsolidationConsolidation again, after an intervening period of breakup or dispersalreconstellationSynonym of regrouping.reconstitutionThe process or result of reconstitutingreconstitutionalizationThe act or process of reconstitutionalizing.reconstrictionThe process of constricting again.reconstructionThe action of reconstructing something, not necessarily to the earlier state.reconsultationA repeat consultationreconsumptionThe process of consuming again.recontaminationcontamination againrecontemplationThe process of contemplating again.recontextualisationAlternative form of recontextualization.recontextualizationThe process or result of recontextualizing.recontinuationContinuation anew; the act of recontinuing.recontractionA second or subsequent contractionrecontribution(finance) The process of contributing an amount previously withdrawn back into the same fund.reconvention(law, civil law) An action brought by the defendant against the plaintiff before the same judgereconversionThe action of converting something again.reconviction(law) Conviction again or anew.reconvocationThe act, or an act, of convocating again.reconvolution(mathematics) A second or subsequent convolution, typically performed after deconvolutionrecoordination(chemistry) A second or subsequent coordination (following dissociation)recordation(law) The act of giving legal status to a document by making it an official public record.recoronationThe act of recoronating.recorporealizationThe process of recorporealizing.recorrectionA second or subsequent correction.recorruptionCorruption again.recoverin(biochemistry) A calcium-binding protein found in the photoreceptor cell of the eye.recreationAny activity, such as play, that amuses, diverts or stimulates.recreolizationThe process of recreolizing.recriminalisationAlternative form of recriminalization.recriminalizationThe act of recriminalizing.recriminationThe act of recriminating.recrown(transitive) To crown again; to provide with another crown.recrucifixioncrucifixion againrecrystallisationAlternative spelling of recrystallization.recrystallization(geology) The process of existing grains in metamorphic rocks changing size.rectahedron(mathematics) A six-sided polyhedron whose faces are all rectangular (like a brick, shoe box or matchbox)rectangularizationThe conversion of a graph (typically of life expectancy) into a more rectangular form (with a sudden diminution to zero at the upper end)rectificationThe action or process of rectifying.rectigradationA qualitative change or the genesis of a new characteristic.rectilinearizationConversion to rectilinear form.rection(grammar, archaic) regimen; government; the rules governing the syntax, rules of agreement of a language.rectitudinarianA person who has a high standard of rectituderecubation(obsolete) recumbence; a state of lying downrecultivationcultivation again or anewreculturalizationThe process of reculturalizing.recumbirostranAny extinct amphibian of the clade †RecumbirostrarecuperationGradual restoration to health.recurarization(pathology) Repeat curarizationrecursionThe act of recurring.recurtain(transitive) To fit with new curtains.recurvationA backwards bending or flexure backwards.recusation(law) The act of disqualifying a judge or jury in a specific case on the grounds of possible partiality or prejudice.recushion(transitive) To fit with new cushions.recussionThe act of beating or striking back.recustomizationThe act of customizing again.recyclization(chemistry) The process of recyclizing.redaction(countable) An edited or censored version of a document; a product resulting from the process of editing or censoring.redampen(transitive) To dampen again.redanA defensive fortification work in the shape of a V.redargution(obsolete) The act of redarguing; refutation.redarkenTo darken again.redarn(transitive) To darn again.redbrownAlternative form of red-brown.redden(intransitive) To become red or redder.redditionrestoration; restitution: surrenderredecisionThe act or result of redeciding.redeclarationThe act of redeclaring.redecorationThe act of redecoratingrededicationA new dedication.redefectionA second or subsequent defection.redefinitionThe act or event of redefining.redehydrationA second or subsequent dehydrationredelegationAct of redelegating.redeletion(rare) deletion againredelineationThe process of delineating again or differently.redemarcationA demarcation again or differently.redemocratizationThe process of making democratic again.redemolitionDemolition again.redemonstrationThe act of demonstrating again.redemptionThe act of redeeming or something redeemed.redenominationThe process of redenominating.redenunciationA second or subsequent denunciation.redepictionThe act of redepicting.redeportationThe act of deporting again.redeposition(geology) The deposition of material originally deposited elsewhere and subsequently movedredeprivationDeprivation again.rederivationA second or subsequent derivationredescriptiondescription again or anewredesignTo lay out or plan a new version of something previously laid out or planned.redesignationThe act of redesignating.redetain(transitive) To detain again.redetectionA second or subsequent detectionredetentionThe act of redetaining.redeterminationThe process of determining again.redfinA common shiner, a small North American dace of species Luxilus cornutus.redhibition(law, Louisiana) The annulling of a sale, and the return by the buyer of the article sold, on account of some defect.rediagonalizationThe process of rediagonalizing.redictationThe act of dictating again.redifferentiationA second or subsequent differentiation after a dedifferentiationrediffusionThe rebroadcasting of a programme; more specifically, the distribution of radio or television transmissions from a single receiverredigestionThe process of redigesting.redigitizationThe process of redigitizing.redilatationA second, or subsequent dilatationredilationdilation againredimension(transitive, programming) To resize (an array or similar data structure) so as to change its dimensionality; to reallocate.redintegration(chemistry, obsolete) Restoration of a mixture to its former nature and state.rediploidisationThe evolutionary process that drives reduction of ploidy of a polyploid species back to the diploid state.rediploidizationAlternative form of rediploidisation.redirectionThe act of setting a new direction.rediscretizationA second or subsequent discretizationredislocationdislocation again or anewredispersionA second or subsequent dispersion; the act of redispersingredispositionreadjustment; the act of redisposingredissectionA second or subsequent dissectionredisseisinAlternative form of redisseizin.redisseizin(law) A disseizin by one who once before was adjudged to have disseized the same person of the same lands, etc.; also, a writ which lay in such a case.redisseminationdissemination againredissolutiondissolution againredistillation(uncountable) The purification of a liquid by means of multiple distillationsredistributionThe act of changing the distribution of resources.redition(obsolete) The act of returning; a return.rediversificationA second or subsequent diversificationrediversionThe process of rediverting; diversion again or anew.redivisiondivision again or anewredmanAlternative form of red man (“American Indian; Native American”, offensive).redneckian(informal, US) Of, pertaining to, or characteristic of rednecks.redneckification(rare, colloquial) The process of becoming a redneck; the changing of something to be suitable for, or characteristic of, rednecks.redocumentationThe process of documenting again.redonTo don again, to put on again.redoxin(biochemistry) Any of a family of proteins that are involved in redox reactionsredrain(transitive) To drain again.redramatizationdramatization againredrawnpast participle of redrawredskin(ethnic slur, offensive) A Native American.reducetarianA person who for ethical reasons attempts to reduce the amount of meat in their diet.reductionThe act, process, or result of reducing.reduplication(linguistics) The act of, or an instance of, reduplicating.reearnAlternative form of re-earn.reeden(archaic, poetic) Made from reeds.reedificationThe act of reedifying; edification again.reeditionAlternative spelling of re-edition.reedmanSomeone who plays a reed instrument.reeducationThe act of educating again or anew so as to rehabilitate or adapt to new situations.reejectionThe act of reejecting.reekin(Geordie) present participle of reekreelectionAct of electing to office one previously elected to and serving in office.reelin(biochemistry) A protein that helps to regulate processes of neuronal migration and positioning in the developing brain.reelmanA person who operates a reel.reembarkationAnother embarkation; the act of reembarkingreemissiona second or subsequent emissionreenA running waterway that links a ditch or stream to a river.reenactionThe process of reenacting.reencryptionA second or subsequent encryptionreendothelialisationAlternative spelling of reendothelialization.reendothelialization(physiology) The regrowth of endothelial tissue following damagereendothelizationAlternative form of reendothelialization.reenergisationAlternative spelling of reenergization.reenergizationenergization following previous deenergizingreentrainTo entrain again or differentlyreenvision(transitive) To envision again or anew.reepidermalizationA second or subsequent epidermalizationreepithelialisationAlternative spelling of reepithelialization.reepithelializationThe reformation of epithelial tissue as part of wound healingreepithelisationAlternative form of reepithelization.reepithelizationAlternative form of reepithelialization.reequilibrationequilibration following a disruption of equilibriumreerectionThe act of reerecting.reescalationAlternative spelling of re-escalation.reesterification(organic chemistry) The act, or the result of reesterifyingreestimationAlternative form of re-estimation (“estimation again; another estimation”).reevaluationA second or subsequent evaluation or ratingreevaporationEvaporation again.reexaminationAlternative form of re-examination.reexcavationA repeated excavationreexcision(surgery) A second or subsequent excision.reexcitationA second or subsequent excitationreexhibitionThe act of exhibiting something again.reexhumationA second or subsequent exhumation.reexpansionanother expansionreexplainAlternative spelling of re-explain.reexplanationA second or subsequent explanation.reexplorationexploration again or anewreexportationThe exportation of something again or anew.reexpressionSubsequent or repeated expression.reexpulsionExpulsion again.reextractionA second or subsequent extractionrefabricationFabrication again or anew; remanufacture.refaction(obsolete) recompense; atonement; retributionrefactorisationAlternative form of refactorization.refactorizationA split into constituent parts after a previous combination.refamiliarisationAlternative spelling of refamiliarization.refamiliarizationThe act or process of refamiliarizing.refashion(transitive) To fashion again or anew.refasten(transitive) To fasten again.refattenTo fatten againrefaunation(ecology) The reintroduction of animals into an environment (following a previous defaunation)refectionMental or spiritual refreshment.refectorarianSynonym of refectorian.refectorianOne in charge of a refectory.refederalizationThe process of refederalizing.refederationThe process of refederating.refeminisationBritish standard spelling of refeminization.refeminizationThe process of making something feminine again.referentiationThe formation of a reference to something.refermentationThe act of fermenting again, the fermentation of something that has already been fermented.refermionization(physics) A second or subsequent fermionization.refertilizationThe process (or act) of refertilizingrefibrillationA second or subsequent fibrillation of the heart (following resuscitation)refiltrationA second or subsequent filtration.refinalizationlegal finalization of an adoption again, as when moving to a new region that does not recognise the previous adoptionrefixationThe fixing in place of something that had previously been removedreflagellation(biology) A second or subsequent flagellation, typically following deflagellationreflation(economics) The act of restoring a deflated general level of prices to a previous or desired level.reflectin(biochemistry) A protein, found in certain squids, that self-organizes into a film of regularly spaced stripes, the separation of which functions as a tunable diffraction grating to produce a range of reflective colours in the animal's skinreflectionThe act of reflecting or the state of being reflected.reflectoporn(slang) Exhibitionism of a sexual nature in which a person takes a photograph of a reflective object, such as a kettle or cutlery, so that their naked image appears in the reflection, and posts the pictures on the Internet, for example when listing the object for sale.reflectorizationThe process of reflectorizing.reflectron(physics, chemistry) A time-of-flight mass spectrometer that uses a static electric field to reverse the direction of travel of the ions entering it.reflexicon(rare) A word list that describes its own letter frequencies.reflexion(grammar, linguistics) An act or instance of referring back to the subject of a sentence, or of having an object equal to the subject.reflexivization(grammar) The process of reflexivizing.refloatationAlternative spelling of reflotation.reflocculationA second or subsequent flocculation, especially following deflocculationreflotationflotation againrefluctuationA flowing back; refluence; ebbing.refocillation(obsolete) The restoration of strength by means of refreshment.refoliationThe regrowth of leaves, either in spring or following defoliationreforestationThe act or process of replanting a forest, especially after clear-cutting.reforestizationreforestation.reformation(law) Change or correction, by a court in equity, to a written instrument to conform to the original intention of the parties.reformulationThe act of formulating anew.refortificationA second or subsequent fortification.refoundationThe process of founding something anew.refraction(metallurgy) The degree to which a metal or compound can withstand heatrefragmentationfragmentation againrefrain(transitive, archaic) To hold back, to restrain (someone or something).refrein(rare) Alternative spelling of refrain.refrenation(obsolete) An act of refraining.refreshen(transitive) To freshen again.refrication(obsolete, nonce word) A rubbing up afresh; a brightening.refrigerationThe process of transferring heat from an object in order to cool it.refrozenHaving been frozen again.refumigationA second or subsequent fumigation.refunction(transitive) To transform (a culture or institution, etc.) in order to promote social change.refunctionalizationThe process of refunctionalizing.refusionNew or repeated melting, as of metals.refutation(proscribed) A vocal answer to an attack on one's assertions.regadenosonAn A2A adenosine receptor agonist that is a coronary vasodilator.regain(transitive) To get back; to recover possession of.regalianOf or pertaining to a royal rulerregarrison(transitive) To garrison again.regelationThe act or process of freezing again.regen(informal) Clipping of regeneration.regenderizationThe act or process of regenderizing.regenerationRebuilding or restructuring; large scale repair or renewal; revitalisation.regentrificationThe act or process of regentrifying.regerminationGermination again or anew; the act of regerminating.reggaetonA style of Latin American popular music, originally developing from reggae in Panama but now more of a type of hip hop-dance music mainly associated with Puerto Rico.reggeatonMisspelling of reggaeton.reggeization(physics) A form of nonrelativistic scatteringreggeon(physics) A virtual particle involved in the scattering described by Regge theory.regian(obsolete) A monarchist; a royalist.regimenOrderly government; system of order; administration.regimentationThe act of regimenting.regionAn administrative subdivision of a city, a territory, a country.regionalisationAlternative spelling of regionalization.regionalizationAn act or process of regionalizing.regioselection(chemistry) regioselective activityregistration(countable, uncountable) The act of signing up or registering for something.reglaciationThe process of reglaciating.regladden(transitive) To gladden again.reglobalizationA second or subsequent globalization.reglucosylation(biochemistry) The reintroduction of a glucose moiety into a moleculereglycosylation(organic chemistry) glycosylation subsequent to deglycosylationregranulationgranulation following a previous degranulationregreen(transitive) To make green again (especially urban developments or ripened fruit).regressionAn action of regressing, a return to a previous state.regrownThat grew, was lost or destroyed, and regrew.regucalcin(biochemistry) A calcium-binding protein that is preferentially expressed in the liver and kidney and may be associated with aging.reguerdon(obsolete, transitive) To recompense or reward.regularisationNon-Oxford British English standard spelling of regularization.regularizationThe act of making regular, of regularizing.regularobufagin(organic chemistry) A cardiotoxic bufanolide steroid secreted by the square-marked toad Bufo regularis.regulation(uncountable) The act of regulating or the condition of being regulated.regulon(genetics) A group of genes that are regulated by the same regulatory molecule. The genes of a regulon share a common regulatory element binding site or promoter. The genes comprising a regulon may be located non-contiguously in the genomeregurgitationThe act of regurgitating.rehabilitationThe process of rehabilitating somebody or something.rehabituationThe process, or the result of rehabituatingrehappen(rare) To happen againrehardenTo harden again.reharmonizationThe process of reharmonizing a musical work; a musical work made by reharmonizing another work.rehearten(transitive) To hearten again.reheightenTo heighten again.reherniationSecond or renewed herniation.rehibition(archaic) The return of a purchased item to the seller, on the ground of defect or fraud.rehomogenizationhomogenization againrehospitalisationAlternative spelling of rehospitalization.rehospitalizationThe process of being hospitalized again.rehumanisationAlternative form of rehumanization.rehumanizationA second or subsequent humanization, typically following dehumanization.rehumidificationThe process of rehumidifying.rehybridization(chemistry) Any change in the hybridization of an atom during the course of a reactionrehydratationMisspelling of rehydration.rehydrationThe replenishment of water and electrolytes lost through dehydration.rehydrogenation(chemistry) Hydrogenation subsequent to dehydrogenation.rehydroxylation(organic chemistry) A chemical reaction that reintroduces a hydroxyl group where one is not present, but previously was.rehypothecation(finance) The pledge of hypothecated client-owned securities in a margin account to secure a bank loan; usually used for mortgages.reidentificationIdentifying again or as something else.reificationThe consideration of an abstract thing as if it were concrete, or of an inanimate object as if it were living.reignThe exercise of sovereign power.reignitionProcess, act or instance of reigniting.reilluminationThe act or process of reilluminating.reillusion(transitive) To restore a false belief.reimaginationThe act or process of reimagining.reimmersionA second or subsequent immersion.reimmigrationimmigration back to the place from which one camereimmunizationThe act of immunizing again; a second or subsequent immunization.reimmunoprecipitation(immunology) A second or subsequent immunoprecipitationreimpactionA second or subsequent impaction.reimplantationThe act of implanting again.reimplementationThe act of implementing again.reimportationthe practice of reimporting somethingreimpositionThe act of reimposing; the act of imposing something again.reimpregnationimpregnation againreimpressionA second or repeated impressionreimprison(transitive) To imprison again.reimputationA second or subsequent imputationreinA strap or rope attached to a bridle or bit, used to control a horse, other animal or young child.reinaugurationA renewed inauguration; an occasion on which someone or something is inaugurated againreincarcerationA second or subsequent incarceration.reincarnationA rebirth of a soul, in a physical life form, such as a body.reincisionA second or subsequent incision.reinclusionA second or subsequent inclusionreincorporationThe act of reincorporating.reincrudation(obsolete) recrudescencereincubationincubation againreinculcationThe act of reinculcating.reincursionincursion againreindentationindentation (of text in a wordprocessor etc.) again or anewreinductioninduction againreindustrialisationAlternative spelling of reindustrialization.reindustrializationThe reintroduction of industry or industrial techniques.reinervationMisspelling of reinnervation.reinfarctionA second or subsequent infarctionreinfectionAnother infection, another instance of being infectedreinfestationA second or subsequent infestation.reinfibulation(surgery) The practice of sewing the external labia back together after deinfibulation.reinflammationinflammation again or anewreinflationinflation againreinflictionThe act of inflicting again.reinfusioninfusion again or anewreingestionThe act of reingesting; ingestion again.reinitialisationAlternative form of reinitialization.reinitializationA process of initializing again.reinitiationA second or subsequent initiationreinjectionA second or subsequent injection.reinnervationthe action of reinnervatingreinoculationinoculation again or anewreinscriptionThe act of reinscribing.reinseminationA second or subsequent inseminationreinsertionThe act of inserting again.reinsman(horseriding) A (male) jockey, especially in harness racing.reinspectionA repeat inspection, especially one carried out after a previous inspection discovered problemsreinspirationThe act of inspiring again.reinstallationThe act or process of reinstalling.reinstantiationThe act or the result of reinstantiating.reinstationreinstatementreinstitutionThe act of reinstituting something.reinstitutionalisationAlternative spelling of reinstitutionalization.reinstitutionalizationThe act or process of reinstitutionalizing.reinstructioninstruction again or anewreinstrumentationinstrumentation again or anewreinswomanA female jockey, especially in harness racing.reintegrationThe act or process of reintegrating.reintensificationThe act of reintensifyingreinteractionA second or subsequent interactionreintermediation(finance) The reintroduction of an intermediary between producer and consumer in order to provide a flow of funds.reintern(transitive) To intern again.reinternalizationThe process of reinternalizing.reinterpolationA second or subsequent interpolationreinterpretation(uncountable) the condition of being reinterpretedreinterrogationinterrogation againreinterventionA second or subsequent interventionreintoxicationA second or subsequent intoxicationreintroductionThe act of introducing something again.reintubationintubation again; reinsertion of a tube into an anatomical organreinvasionThe act or process of reinvading; a subsequent invasion.reinventionA reinventing of something.reinversionA second or subsequent inversion.reinvestigationAn act or process of reinvestigating: a repeat of an earlier investigationreinvigorationThe act or action of reinvigorating.reinvitationThe act of giving an invitation again.reinvocationinvocation againreionisationAlternative spelling of reionization.reionizationThe act or process of reionizing.reirradiationirradiation againreirrigationThe process of reirrigating.reisolationThe act or process of reisolating.reisomerization(chemistry) A second or subsequent isomerizationreiterationThe act of reiterating.rejapan(transitive) To japan again.rejectionThe act of rejecting.rejoinTo join again; to unite after separation.rejourn(obsolete, transitive) To adjourn; to put off.rejustificationThe act of justifying again.rejuvenationThe process of rendering young again.reketonization(organic chemistry) A second or subsequent ketonizationreknownMisspelling of renown.relactation(medicine, obstetrics) The process of relactating.relaminarizationA second or subsequent laminarization; the act of relaminarizingrelateralizationA change in brain lateralization, typically following an injuryrelationThe manner in which two things may be associated.relativisationAlternative form of relativization.relativizationThe act or process of relativizing.relawn(transitive, rare) To provide with a new lawn.relaxacon(fandom slang) An informal science fiction convention with no schedule.relaxationThe act of relaxing or the state of being relaxed; the opposite of stress or tension; the aim of recreation and leisure activities.relaxiconAlternative form of relaxacon.relaxin(biochemistry) A peptide hormone of the insulin superfamily.relaxion(physics) A form of axion proposed to account for cosmological relaxation of the electroweak interactionrelbun(archaic) The roots of the plant Calceolaria arachnoidea, used for dyeing crimson.relcovaptanA certain vaptan drug proposed for the treatment of Raynaud's disease, dysmenorrhoea, and tocolysis.relearn(transitive) To learn (something) again.relegalisationAlternative form of relegalization.relegalizationAct or process of relegalizing.relegationThe act of being relegatedrelegislationThe process of legislating again.relegitimationThe process of relegitimating.relegitimizationThe process of relegitimizing.relengthenTo lengthen again.relevation(obsolete) A raising or lifting uprelexicalizationAct or process of relexicalizing.relexification(linguistics) The mechanism of language change by which one language replaces much or all of its lexicon with that of another language.relictionthe gradual loss of water from a river, lake, etc. to leave permanent dry landreligationA second or subsequent ligationrelighten(transitive) To lighten again.religificationThe process of religifying.religion(countable) A particular system of such belief, and the rituals and practices proper to it.religionizationThe process of becoming more religious or religionistic in nature.relijunEye dialect spelling of religion.relimn(transitive) To limn or depict anew.relinearizationThe process of relinearizing.relineationThe act of redrawing lines, or the act of realigning more than one item so they match.relipidationA second or subsequent lipidationreliquefactionLiquefaction again or anew.reliqueficationLiquefication again or anew.reliquianOf, pertaining to, or of the nature of relics.reliquidationA second or subsequent liquidation.reliquificationLiquification again or anew.relisten(intransitive) To listen again.relitigationThe act or process of relitigating.reloanA second lending of the same thing; a renewal of a loan.relocalisationAlternative form of relocalization.relocalizationThe act of relocalizing.relocationThe act of moving from one place to another.relomycin(pharmacology) A macrolide antibiotic.reloosenTo loosen again.relubricationThe act of relubricating.reluctation(now rare) Reluctance, unwillingness.remagnetizationThe act or process of remagnetizing, of restoring magnetism to something which has been demagnetized.remain(in the plural) That which is left of a human being after the life is gone; relics; a dead body.remainderman(law) A person entitled to receive a remainder interest in any property.remanTo supply with new personnel.remanationThe act of returning; reabsorption.remancipationThe act of remancipating.remanifestationA second or subsequent manifestation.remarginTo change the size of the margin (on a document).remarginalizationmarginalization againremasculinizationThe process of making something masculine again.remasticationThe act of masticating or chewing again or repeatedly.rematerialisationAlternative form of rematerialization.rematerializationThe act or process of rematerializing.rematriationA return to a spiritual way of life with respect for Mother Earth.rematriculationThe process of rematriculating.rematuration(biology) A second or subsequent maturationremechanizationThe process of remechanizing.remediationThe act or process of remedying a situation.rememorationRecall by means of the memory; remembrance.rememorizationThe act of rememorizing.rementionA subsequent mentionremesothelializationmesothelialization after previous loss of the mesotheliumremesothelizationA second or subsequent mesothelization, typically following demesothelizationremetalationThe act, or the result of rematalatingremethylation(biochemistry) methylation subsequent to demethylationremigrationMigration again to another place, or back to the place of emigration.remikiren(pharmacology) A renin inhibitor under development for the treatment of hypertension.remilitarisationAlternative form of remilitarization.remilitarizationThe act or process of remilitarizing.remineralisationAlternative spelling of remineralization.remineralization(biochemistry) The continuous reintroduction of minerals into bone and teeth.remipedianAny crustacean of the class RemipediaremissionA pardon of a sin; (chiefly historical, also figuratively) the forgiveness of an offence, or relinquishment of a (legal) claim or a debt.remobilisationAlternative spelling of remobilization.remobilizationThe return of a substance to circulation within a system, such as substances which had been locked in sediments.remoderationThe act of remoderating; moderation again.remodificationThe act or result of remodifying; subsequent modification.remodularizationThe process of remodularizing.remodulationA second modulationremogliflozin(pharmacology) Synonym of remogliflozin etabonate.remoisten(transitive) To moisten again.remoisturizationThe process of remoisturizing.remoleculization(chemistry, archaic) The formation of a new compound by rearrangement of the molecules.remoltenMade molten again.remonetisationNon-Oxford British English standard spelling of remonetization.remonetization(economics) The act or process of remonetizing, or restoring to the status of legal tender.remonstrationEarnest protest or objection, disapproving pleading, or an act thereof.remonumentationThe construction of a surveying monument at the location of a previously existing monument.remorin(biochemistry) Any of a class of protein found in solanaceous plantsremotion(zoology, chiefly entomology) Backward motion.remotivationA form of therapy attempting to re-establish an interest in the world in institutionalized patients.remourn(transitive) To mourn again.remultiplicationmultiplication againremunerationSomething given in exchange for goods or services rendered.remunition(ambitransitive) To take on, or supply with, new munitions.remuscularizationmuscularization following the loss of musculatureremutationmutation again, or back to a previous formremutualisationA second or subsequent mutualisationremutualizationThe act or process of remutualizing.remyelinationThe regeneration of a nerve's myelin sheath.remyelinisationAlternative form of remyelinization.remyelinizationA second or subsequent myelinizationren(anatomy) A kidney.renarrationThe process of narrating again.renationalisationNon-Oxford British English standard spelling of renationalization.renationalizationA nationalization of something which had previously been nationalized and then privatized.renativization(linguistics) the return to use of a local or regional language whose use was previously discouraged or suppressedrenaturalisationNon-Oxford British English standard spelling of renaturalization.renaturalizationThe act of renaturalizing.renaturation(biochemistry) The reconstruction of the original form of a protein or nucleic acid following denaturationrenavigationNavigation again; the act of renavigating.renditionAn interpretation or performance of an artwork, especially a musical score or musical work.renegation(obsolete) a denialrenegotiationThe act of negotiating again.renervationSynonym of reinnervation.reneutralizationA second or subsequent neutralizationrenieramycinAny of a group of isoquinoline antitumor alkaloids found in some marine spongesrenin(biochemistry) A circulating enzyme released by mammalian kidneys that converts angiotensinogen to angiotensin I. Due to its activity which ultimately leads to the formation of angiotensin II and aldosterone, this hormone plays a role in maintaining blood pressure.renitrosylationA second or subsequent nitrosylation, typically following a denitrosylationrennin(biochemistry) A proteolytic enzyme, obtained from the gastric juice of the abomasum of calves, used to coagulate milk and make cheese.renninogen(obsolete) Synonym of prochymosin.renodulationThe process of renodulating.renominationThe act of renominating, of nominating again.renoprotection(medicine) The protection of the kidneys from damagerenormalisationAlternative spelling of renormalization.renormalization(physics) Any of several techniques in statistical mechanics and quantum electrodynamics used to construct mathematical relationships between observable quantities.renormalon(physics) A poorly-understood and, so far, undefined singularity associated with quantum chromodynamicsrenotificationnotification againrenovationAn act, or the process, of renovating.renoviction(chiefly British Columbia, Quebec) The eviction of all of a building's tenants on the grounds that a large-scale renovation is planned.renownFame; celebrity; wide recognition.renucleationThe insertion of a nucleus into a cell from which the original nucleus was removedrenumerationThe act or process of renumerating (counting or numbering again).renunciationThe act of rejecting or renouncing something as invalid.renutritionSynonym of refeeding.reobjectificationAct or process of reobjectifying.reobjectivizationObjectivization again.reobservationobservation againreobtain(transitive) To obtain again.reoccasion(transitive) To occasion again.reocclusion(medicine) The recurrence of occlusion after it has been treated.reoccupation(uncountable) The condition of being reoccupiedreoligotrophicationA repeat oligotrophicationreopen(transitive) To open (something) again.reoperation(surgery) A second or subsequent operationreoppositionThe act of opposing again.reoptimizationThe act of reoptimizingreoption(transitive) To option again.reorchestrationSecond or subsequent orchestration.reordain(transitive) To ordain (a church official) again.reordinationA second or subsequent ordination; an act of reordaining.reorganisation(British spelling) Alternative spelling of reorganization.reorganizationThe act or process of rearranging. See reorganize.reorientationA new orientation.reorthogonalisationAlternative form of reorthogonalization.reorthogonalizationA second or subsequent orthogonalizationreossificationOssification again or anew.reovirionThe virion of a reovirusreovulationA second or subsequent ovulationreoxidationA second or subsequent oxidation (e.g. of hemoglobin)reoxygenation(especially of blood) Oxygenation subsequent to deoxygenation.repacketizationThe process of repacketizing.repaganizationThe process of repaganizing.repaginationThe act or process of repaginating.repairmanA male repairer, a man who repairs things.repairmenplural of repairmanrepairpersonSynonym of repairer, a person who repairs things.repairwomanA female repairer, a woman who repairs things.repalletizationThe process of repalletizing.repalpationThe process of palpating again.reparameterisationAlternative form of reparameterization.reparameterizationA second or subsequent parameterizationreparametrisationAlternative form of reparameterization.reparametrizationAlternative spelling of reparameterization.reparasitizationA second or subsequent parasitisationreparation(usually in the plural) A payment of time, effort or money to compensate for past transgression(s).reparixin(organic chemistry) The chemokine receptor inhibitor (2R)-2-[4-(2-methylpropyl)phenyl]-N-methylsulfonylpropanamiderepartitionA distribution or apportioning of something again.repassion(obsolete) The reception of an effect from one body to another.repassivationA repeat passivationrepasteurizationThe act of repasteurizing.repastination(obsolete) A second or subsequent digging up, as of a garden.repathologizationThe process of repathologizing.repatriationThe process of returning of a person to their country of origin or citizenship.repatternTo pattern again.repawn(transitive) To pawn again.repeatationMisspelling of repetition.repedation(obsolete, literal or figurative) A stepping or going back.repen(transitive) To rewrite.repenetrationThe act of penetrating again.reperceptionThe act of perceiving againrepercolation(pharmacy) The successive application of the same menstruum to fresh parts of the substance to be percolated.repercussionA consequence or ensuing result of some action.reperforationperforation again or anewreperfusion(medicine) The restoration of blood flow to an organ, after it was cut off (e.g. in an operation).reperiodizationThe process of reperiodizing.reperitonealization(medicine) Regeneration of the mesothelial lining of the peritoneal cavity, following injury.reperpetrationThe act of perpetrating again.repersonalization(psychology, psychiatry) The regaining of the sense of self regarding one's mind or body; the cessation of depersonalization.repersuasionThe process of persuading again.repertaxinAn inhibitor of chemokine receptors, R(-)-2-(4-isobutylphenyl)propionyl methansulphonamidereperturbationA second or subsequent perturbationrepetitionThe act or an instance of repeating or being repeated.rephonemicizationThe process or result of rephonemicizing.rephonologization(phonology) Synonym of transphonologization.rephosphorylation(biochemistry) Phosphorylation of a compound, such as a protein, which has previously been dephosphorylatedrepiferminA recombinant human keratinocyte growth factor that is used to help wound healingrepigmentationThe recovery of pigmentation after its loss.repin(transitive) To pin again.repititionMisspelling of repetition.replanTo plan again; to make a different plan.replantationReplanting (of plants, fields, or landscaping).repletionThe condition of being replete; fullness.replevin(transitive) To replevy.replicationThe process by which an object, person, place or idea may be copied mimicked or reproduced.replicon(genetics) A DNA molecule or a region of DNA that replicates as an individual unit. A replicon may be, for instance, a chromosome, a plasmid or a phage.repolarisationAlternative spelling of repolarization.repolarizationThe act of repolarizing.repoliticizationThe process of politicizing again.repollutionThe act of polluting again.repolymerisationAlternative form of repolymerization.repolymerizationPolymerization following a previous depolymerization.repopularizationA subsequent popularization.repopulationThe act of repopulating, especially with a species that might otherwise die out in an area.reportionTo reapportion.repositionTo put into a new positionrepossession(uncountable) The condition of being repossessed.repostulationThe act of postulating again.repotentiationA second or subsequent potentiationreprecipitation(chemistry) After returning a precipitate to a dissolved state, the process of precipitating it again.reprehensionthe act, or an expression, of criticism, censure or condemnation; reprimandrepreparationA repeated preparation.represcriptionA second or subsequent prescriptionrepresentamen(semiotics) A representation; a thing serving to represent something.representationThat which represents something else.repressionThe act of repressing; state of being repressed.repressurisationAlternative form of repressurization.repressurizationA second or subsequent pressurization, especially following a depressurizationreprimitivizationThe process of reprimitivizing.reprioritisationAlternative spelling of reprioritization.reprioritizationA second, or an altered, prioritization.repristinationRestoration to an original or pure state.reprivatisationAlternative form of reprivatization.reprivatization(economics) The process of, or an instance of, returning to private ownership.reprobationThe act of reprobating; the state of being reprobated; strong disapproval, reproof or censure.reproblematizationThe process of reproblematizing.reproductionThe act of reproducing new individuals biologically.reprohibitionA second or subsequent prohibition.reprojectionProjection again or anew; the act of reprojecting.reproliferationA second or subsequent proliferationreprolysin(biochemistry) A group of metalloproteases, that contains zinc, found in some snake venomrepromission(obsolete) A promise.repromotionpromotion againrepromulgationThe act of promulgating again.repronunciationThe act of pronouncing again or differently.repropagationpropagation again or anewreproportion(transitive) To modify to have different proportions.reprosecutionThe process of reprosecuting.reprotectionThe act of protecting again.reprotonation(chemistry) A second or subsequent protonation, typically following a deprotonationreprovision(transitive) To supply with provisions again.reptantianAny decapod of the clade Reptantia.reptationA creeping movement.reptilian(zoology) Of or relating to the members of the class Reptilia (reptiles).reptin(biochemistry) An ATPase that is a component of telomeraserepton(physics) A single entangled monomer in a system undergoing reptationrepublicanAdvocating or supporting a republic as a form of government, advocating or supporting republicanism.republicanizationThe act or process of converting (a state etc.) to republican principles.republicarian(obsolete) republicanrepublicationThe act of publishing again.republikkkanAlternative letter-case form of RepubliKKKan.repudiationThe act of refusing to accept; the act of repudiating.repuditationMisspelling of repudiation.repugn(archaic) To oppose or resistrepullulation(botany) A second or subsequent budding.repulsionThe act of repelling or the condition of being repelled.repulson(physics) A repulsive singularity proposed in some forms of gauge theoryrepulverizationThe act of pulverizing again.repunctuationThe process or result of repunctuating.repurificationThe act or process of repurifying.reputationWhat somebody or something is known for.requalificationThe act of qualifying againrequantificationThe process, or the result of requantifyingrequantizationThe quantization of an analog signal generated from an existing digital one.requeen(beekeeping) To change or replace the queen bee of a colony of bees.requestionTo question again.requestman(naval) One who submits a formal request.requicken(transitive) To quicken anew; to reanimate or give new life to.requin(dated) The great white shark (Carcharodon carcharias).requisitionA formal request for something.requotationThe act of quoting something again.reracializationThe process of reracializing.reradiation(physics) The emission of incident radiationreradicalizationThe act or process of reradicalizing.reransimple past of rerunrerandomisationAlternative form of rerandomization.rerandomizationRandomization again or anew.rerationalizationThe process of rerationalizing.reredemain(archaic) A backward stroke of the hand.rereductionA second or subsequent reduction, especially following an oxidationreregistrationA second or subsequent registration.reregulationThe act or process of regulating again, or reversing deregulationrereign(intransitive) To reign again.rereplicationreplication againreresectionResection again.rerestitutionAlternative form of re-restitution.rereturnAnother return.rerunAn act or instance of rerunning; a repetition.resacralizationThe return of religious meaning to areas of public life.resalinizationsalinization again or anewresatisfactionThe act of satisfying again.resaturationsaturation againresazurin(organic chemistry) A blue dye that is reduced to the fluorescent derivative resorufinrescinsion(law, parliamentary language) Rescission.rescissionAn act of rescinding: removing, taking away, or taking back.rescreen(transitive) To screen again.rescription(obsolete) The act of writing back; the answering of a letter.rescuemanA man who rescues people.reseason(transitive) To season again.resecretionA second or subsequent secretionresection(medicine) The surgical removal of part or all of a tissue, organ, tumor, or body part.resecuritizationThe process of resecuritizing.resedationA second or subsequent sedationresedimentationA second deposition of sedimentresegmentationThe process or an instance of resegmenting.resegregationThe state or process of being segregated again or in a new wayreselectionA second or subsequent selectionresemanticizationA second or subsequent semanticization, typically following desemanticizationresensitisationAlternative form of resensitization.resensitizationA second or subsequent sensitization, especially following desensitizationreseparationseparation againresequestration(chemistry) sequestration of ions that have been desequesteredreserializationThe act or process of reserializing.reservationThe act of reserving, withholding or keeping back.resharpensharpen againresibufagenin(organic chemistry, medicine) A synthetic bufadienolide that has been used in the treatment of preeclampsiaresibufogeninAlternative form of bufogenin.residualisationThe action or the result of residualising.residualizationAlternative form of residualisation.residuationThe process of residuating, or computing a residual.resign(transitive) To give up; to relinquish ownership of.resignationThe act of resigning.resignificationThe act or process of resignifying, or giving a new meaning to something.resiliation(Canada law) The act of cancelling, annulling or drawing back from (a contract).resilin(biology) An elastic protein found in the exoskeletons of insects, facilitating, for example, folding wings or jumping relatively great distances.resilition(archaic) resilienceresiluation(obsolete) renewed attackresimulationA second or subsequent simulationresinAny synthetic compound of similar properties.resinationThe process, or the result, of resinatingresingularizationThe process of singularizing again; a return to the singularity or uniqueness of things.resiniferatoxin(organic chemistry) A naturally occurring ultrapotent capsaicin analogue (having in its pure form a Scoville heat unit measure of 16,000,000,000) that activates the receptor TRPV1 (aka vanilloid receptor 1 or the capsaicin receptor) in a subpopulation of primary afferent sensory neurons involved in nociception.resinificationThe act or process of resinifying.resinizationThe process of resinizing.resistinA hormone secreted by adipose tissueresistomycinSynonym of heliomycin.resituationAct or process of resituating.reskin(computing, transitive) To change the skin, or visual appearance, of an application or a video game character etc.resmethrinA pyrethroid insecticide with many uses, including control of the adult mosquito population.resnatron(historical) A large power tube designed to jam enemy radar by generating power at microwave frequencies.resocialisationAlternative form of resocialization.resocializationThe psychological readjustment of a person to conform to the norms of society (e.g. after being institutionalized)resoftenTo soften again.resofurinMisspelling of resorufin.resolemnizationThe process of resolemnizing.resolicitationSolicitation again.resolidificationThe process or instance of resolidifying.resolubilisationAlternative form of resolubilization.resolubilizationThe process of redissolving.resolutionA firm decision or an official decision.resolvation(chemistry) The replacement of an associated solventresolvin(biochemistry) Any of various compounds that are made by the human body from the omega-3 fatty acids eicosapentaenoic acid and docosahexaenoic acid, believed to reduce cellular inflammation.resomationA process for the disposal of a corpse by submerging it in a strong base compound at a high pressure and temperature until it dissolves.resonationThe act or state of resonatingresonicationThe process, or the result of resonicatingresorcin(organic chemistry) Synonym of resorcinol.resorfurinMisspelling of resorufin.resorptionThe act of resorbing.resorufin(organic chemistry) A red, fluorescent dye, 7-hydroxy-3H-phenoxazin-3-one, related to resazurinresovietizationThe act or process of resovietizing.respatializationThe process of respatializing.respawn(zoology) To spawn again.respecificationThe act or process of respecifying; a change from a previous specificationrespection(obsolete, Early Modern) respect; regardrespersion(obsolete) The act of sprinkling or scattering.respiration(uncountable) The process of inhaling and exhaling.respirofermentation(biochemistry) Simultaneous respiration and fermentation, typically in bacteria or yeastsresponsibilisationNon-Oxford British English standard spelling of responsibilization.responsibilization(sociology) The transfer of responsibility from higher authorities to communities or individuals who are then called on to take an active role in resolving their own problems.responsion(UK, education, historical, in the plural) The first of three examinations once required for an academic degree at the University of Oxford; nicknamed the little go and generally taken around the time of matriculation.resporulationsporulation againrestabilisationAlternative form of restabilization.restabilizationThe process of restabilizing.restagnation(obsolete) stagnationrestainto stain againrestandardizationA second or subsequent standardization, sometimes to a new standardrestation(transitive) To assign (military personnel) to a different area.restaurationObsolete form of restoration.resterilizationThe process of resterilizing.restiffenTo stiffen again.restimulationThe process of restimulating.restinctionThe act of extinguishing.restipulationA subsequent stipulation.restitution(law) A process of compensation for losses.restorationThe process of bringing an object back to its original state; the process of restoring something.restraighten(transitive) To straighten again.restrain(transitive) To control or keep in check.restrategizationThe development of a new strategy.restratificationThe formation of new strata or layers.restrengthento strengthen again, to make stronger againrestrictionThe act of restricting, or the state of being restricted.restrictocinA protein ribotoxin present in fungi of the genus AspergillusrestructuralizationA second or subsequent structuralizationrestructuration(nonstandard, non-native speakers' English) Restructuring.restructurisationUK, Ireland, Australia, New Zealand, and South Africa spelling of restructurization.restructurizationrepeated structurizationresubjectionA second subjection.resubjugationThe process of subjugating again.resublimationsublimation againresubmissionThe act or process of resubmitting; a second or subsequent submissionresubscriptionThe act of resubscribing.resubstitutionsubstitution againresubversionThe process of subverting again.resudation(rare) The act of sweating again.resulfurationA second or subsequent sulfuration (typically following a desulfuration)resummation(mathematics, physics) A procedure to obtain a finite result from a divergent sum (series) of functions, involving the integral transformation of another (convergent) function in which the individual terms defining the original function are rescaled.resummonTo summon again.resumptionThe act of resuming or starting something again.resupination(botany) The twisting of flowers or leaves by about 180° as they open.resupplementationRenewed supplementation following depletionresuppressionSuppression again.resurrectionThe act of arising from the dead and becoming alive again.resuscitationThe act of resuscitating.resuspensionA second or subsequent suspension.resyllabification(phonology) The process or result of resyllabifying.resymbolizationThe act or process of resymbolizing.resynchronisationAlternative form of resynchronization.resynchronizationA second or subsequent synchronization.resyndicationsyndication againretabulationThe act or process of retabulatingretainOften followed by from: to hold back (someone or something); to check, to prevent, to restrain, to stop.retaliationViolent or otherwise punitive response to an act of harm or perceived injustice; a hitting back; revenge.retan(transitive) To tan again.retapamulinA topical antibiotic, the first pleuromutilin to be approved for human use.retardationThe act of retarding or delaying; hindrance.retardicanAlternative letter-case form of Retardican.retardlicanAlternative letter-case form of Retardlican.retaxationThe act of taxing something again; recalculation of tax.retconA fictional setting in which a new storyline explains or changes a previous event or attaches a new significance to it.retection(engineering) Detection through a concealing layer. (Note: this use is somewhat specific to electrical engineering and related fields investigating the uses of T-Ray Sensing.)retentionThe act of retaining or something retained.reterminationTermination again.reterritorializationThe restructuring of a place or territory that has experienced deterritorialization.retheorizationThe process or result of retheorizing.rethermalizationA second or subsequent thermalizationrethickenTo thicken again.reticularianof or pertaining to Reticulariareticularization(pathology) settlement in the reticulumreticulationA network of criss-crossing lines, strands, cables or pipes.reticulin(biochemistry) A scleroprotein, similar to collagen, found in lymphatic connective tissuereticullinMisspelling of reticulin.reticulocalbin(biochemistry) A calcium-binding protein from the lumen of the endoplasmic reticulumreticulon(biochemistry) Any of a group of proteins found in the endoplasmic reticulum that have a variety of functions.reticulorumenThe first chamber in the alimentary canal of ruminant animals, composed of the rumen and reticulumretightento tighten againretin(transitive) To coat with tin again.retinizationThe adjustment period in which the face adapts to a retinoid treatment.retinophilin(biochemistry) A phosphoprotein in the photoreceptors of fruit fliesretinoschisin(biochemistry) A protein, present in the retina, that is associated with retinoschisisretinoylation(biochemistry) Reaction, typical of protein, with a retinoyl group or other derivative of retinoic acid.retitelarianOf or relating to the Retitelae, a group of spiders.retokenizationProcess of retokenizing.retopicalizationThe act or process of retopicalizing.retopologization(computer graphics) Synonym of retopology.retorsion(law) An act of retaliation taken by one nation against another as a reprisal.retortionAlternative form of retorsion.retoughenTo toughen again.retoxificationThe process of making something toxic again.retractation(archaic) retraction (of something previously said)retractionAn act or instance of retracting.retraditionalizationA return to traditional methodsretrain(ambitransitive) To train again; especially, to train or study in a new subject or jobretranscriptionA second or subsequent transcription.retransductionA second or subsequent transductionretransfectionA second or subsequent transfectionretransfigurationtransfiguration againretransformationtransformation again or anewretransfusionA second or subsequent transfusion.retransitionAnother transition.retransitivization(linguistics) The process of retransitivizing.retranslationTranslation again or anew.retransliterationThe act, process or result of transliterating.retranslocationrepeated or reverse translocationretransmissionThe transmission of something again, especially over a different medium or at a different time.retransplantationA second or subsequent transplantationretraumatisationAlternative form of retraumatization.retraumatization(psychology) A relapse into a state of trauma, triggered by a subsequent event.retriangulationTriangulation again.retribalisationAlternative spelling of retribalization.retribalizationThe process of retribalizing.retributionPunishment inflicted in the spirit of moral outrage or personal vengeance.retriplication(linguistics) A reduplication in which the repeated element occurs three times.retroactionAny action that has an influence due to a past eventretroaddition(obsolete, organic chemistry) A cycloelimination.retroaldolization(organic chemistry) The reverse of an aldolization reactionretrocalculationThe action or process of calculating retrospectively.retrocessionThe transfer of risk from one reinsurer to another.retroclinationA backwards inclination (especially of teeth)retroclusion(dated) An acupressure technique in which the pin passes behind the artery, after its point is made to describe the greater part of a semicircle.retrocognition(parapsychology) extrasensory knowledge of past events.retroconversionconversion back to a previous (typically an original) formretrocopulation(zoology) Copulation from behind.retrocyclin(biochemistry, genetics) An artificial human theta-defensin shown to be effective against HIV and other viruses.retrocycloaddition(obsolete, organic chemistry) cycloeliminationretrodeformationA process that produces the original form of a deformed object (or, more often, its image)retrodictionA form of "prediction" that deals with the past rather than the future, sometimes useful in testing theories whose actual predictions are too long-term to be of immediate use.retrodifferentiation(biology) retrograde differentiation (of cells)retrodigitizationThe conversion into digital format of a work designed and published in an earlier era.retrodimerization(organic chemistry) Any reaction in which a dimer is converted to the original monomersretrodismutation(biochemistry) The reverse of a dismutation reactionretroduction(logic) Synonym of abduction.retroduplication(genetics) The reverse transcription of a gene from mRNA into a complementary DNA copyretrofashionAny fashion characterized by clothes associated with a previous era.retroflectionThe condition of being bent backwards.retroflexionThe act of retroflexing; the state of being retroflexed.retrogradationMotion in a retrograde manner.retrogrationretrogradationretrogreen(colloquial, rare) To retrofit existing models or structures (theoretical or physical) to accommodate environmentally friendly values.retrogressionA deterioration or decline to a previous state.retroillumination(medicine) The examination of a body part, or a tissue sample, by shining light from directly behind it.retroinfectionAn infection in the reverse of the normal direction, especially an infection of a mother from a fetusretroinhibition(biochemistry) A form of feedback in a cyclic metabolic pathway in which an end product inhibits an allosteric enzyme that starts the reactionretrojection(medicine) The washing out of a cavity by the backward flow of an injected fluid.retromargin(zoology) The posterior margin of the fang furrow in the chelicera.retromobilization(genetics) Synonym of retrotransfer.retromoderation(Internet) The process of retromoderating.retromodernAlternative form of retro-modern.retromutation(genetics) A mutation to a previous (typically an original) form.retron(biochemistry) A sequence of DNA associated with reverse transcriptionretropepsin(biochemistry) Any of a group of retroviral proteasesretroperfusion(surgery) Synonym of retrograde perfusion.retropicalization(geology) A second or subsequent tropicalizationretroposition(genetics) The insertion of a fragment of DNA into a chromosome following reverse transcriptionretroposon(genetics) A fragment of DNA inserted into a chromosome following reverse transcription from RNA.retroprojection(cinematography) back projectionretropropulsion(astronautics) Backward propulsion, especially the use of rockets to brake or change direction.retropulsion(medicine) A tendency to step or walk backwards involuntarily, especially as a symptom of parkinsonism.retroreflection(physics) reflection in which the reflected rays are parallel to the incident raysretroregulation(genetics) regulation of mRNA translation by a sequence that is downstreamretrospectionThe deliberate recall of past events.retrotorsion(anatomy) A twisting between the neck and condyle of a bone such as the femur beyond the established normalretrotranscription(genetics) Synonym of reverse transcription.retrotransductionretrograde transduction (of DNA)retrotranslocation(biochemistry) The reverse process of translocation.retrotransloconA translocon associated with retrotranslocationretrotransposition(genetics) The reverse transposition of an RNA intermediate.retrotransposon(genetics) A transposable fragment of a genome that can undergo retrotransposition.retrovaccination(archaic, veterinary medicine medicine) The inoculation of a cow with human vaccine virus.retroversioflexion(medicine, pathology) A displacement of the uterus in which the organ is both retroverted (tilted backward in the pelvis) and retroflexed (bent backward upon itself at the cervix).retroversionA turning or falling back.retrovirionA virion of a retrovirusretrovisionThe power of mentally seeing events from the past.retrusionThe act of retruding, or the state of being retruded.return(intransitive) To come or go back (to a place or person).retvrn(Internet slang) To return to the aesthetics or traditions of an earlier historical era.retypification(botany) The act of typifying again (selection of a new type specimen or type species).retyrosinationtyrosination again, typically following detyrosinationretzian(mineralogy) A certain arseniate mineral.reulcerationulceration occurring againreunificationThe unification of something that was previously divided; used especially of a country.reunionThe process or act of reuniting.reunition(dated) reunionreurbanisationA second or subsequent urbanisationreurbanizationThe process of reurbanizing.reutericinA bacteriocin produced by Lactobacillus reuteri.reutericyclinA tetramic acid antibiotic produced by Lactobacillus reuteri.reuterinAn antimicrobial substance produced by Lactobacillus reuteri.reutilisationAlternative form of reutilization.revaccinationA second or subsequent vaccination.revagination(surgery) vaginal cosmetic surgery or other cosmetic treatment of the vagina.revalidationThe act of revalidatingrevalorization(economics) The fact or process of setting a new value for a given commodity, currency etc.revaluationThe process of altering the relative value of a currency or other standard of exchange.revascularisationAlternative spelling of revascularization.revascularization(surgery) The restoration of a blood supply to an organ or limb, as:revefenacinA bronchodilator used to treat chronic obstructive pulmonary disease.revegetationThe act or process of revegetatingrevelationThe act of revealing or disclosing.revendicationThe act of revendicating.reverbation(rare) Alternative form of reverberation.reverberationA violent oscillation or vibration.reverificationverification againreveromycin(organic chemistry) Any of a group of complex spiroketals, isolated from soil actinomycete of the genus Streptomyces, that have antibiotic activity and inhibit cell growthreversionThe act or process of reverting something.revesiculationA second or subsequent vesiculationrevictimisationAlternative form of revictimization.revictimizationvictimization again or anewreviction(obsolete) revival (return to life, usually figuratively)revindicationAn act of revindicating.reviolationviolation againreviparin(pharmacology) An antithrombotic belonging to the group of low-molecular-weight heparins.revirginationThe restoration of virginity.revirginizationThe process of revirginizing.revision(uncountable) The process of revising:revisitationAn act of revisitingrevisualisationAlternative form of revisualization.revisualizationvisualization again or anewrevitalisationNon-Oxford British English standard spelling of revitalization.revitalizationThe process of revitalizing.revivication(obsolete) The act of revivicating.revivificationThe act of reviving; restoration of life.revocationAn act or instance of revoking.revolatilizationA second or subsequent volatilization.revolution(countable, politics) A political upheaval in a government or state characterized by great change.revolutionisationAlternative form of revolutionization.revolutionizationThe act or process of revolutionizing.revulcanizationThe process of revulcanizing.revulsionAbhorrence, a sense of loathing, intense aversion, repugnance, repulsion, horror.rewaken(archaic) To awaken again; to rewakerewarn(transitive) To warn again.reweakenTo weaken again.rewetten(informal, rare) Wetten again.rewhitenTo whiten again.rewidenTo widen again.rewin(transitive) To win again or anew, to win back.rewovenHaving been woven again.rewriteman(journalism) A newspaper reporter who crafts stories from information reported by others, such as legmen.rewrittenpast participle of rewritereynObsolete form of rain.rezafunginAn antifungal drug of the echinocandin class.rhabarbarin(chemistry) chrysophanic acidrhabditophoranAny flatworm of the class RhabditophorarhabdodontomorphanAny dinosaur of the clade †RhabdodontomorpharhabdophoranOf or relating to the Rhabdophora.rhabduscin(organic chemistry) An amidoglycosyl- and vinyl-isonitrile tyrosine derivative that is a perimeter defense molecule in entomopathogenic bacteriarhachidian(anatomy) Of or pertaining to the rachis.rhagon(zoology) A form of sponge with clustered spherical flagellated endodermal chambers.rhamnetin(organic chemistry) An O-methylated flavonol that can be isolated from cloves.rhamnocitrin(organic chemistry) The cyclic ketone 3,5-dihydroxy-2-(4-hydroxyphenyl)-7-methoxychromen-4-onerhamnogalactan(biochemistry) A polysaccharide composed of rhamnose and galactose uitsrhamnogalacturonan(biochemistry) A polysaccharide, consisting mostly of rhamnose and galacturonic acid, that is found in plant cell wallsrhamnomannan(biochemistry) A mannan derived from rhamnoserhamnospondin(genetics) A lectin gene associated with the binding of rhamnoserhamnosylation(organic chemistry) Any reaction that forms a rhamnosiderhamnoxanthinSynonym of frangulin.rhaphidophoridanAny insect (such as cave crickets) of the superfamily RhaphidophoridaerhaphoneidaceanAny diatom of the family Rhaphoneidaceaerhaponticin(organic chemistry) A glucoside of rhapontigenin present in rhubarb rhizomesrhapontigenin(organic chemistry) A stilbenoid, found in Vitis coignetiae, that inhibits the human cytochrome P450 1A1, an enzyme implicated in the biotransformation of a number of carcinogenic and immunotoxic compounds.rhapsodizationThe process or an instance of making something rhapsodic.rhaptochelydianAny species of reptile in the taxon Rhaptochelydia.rhasonThe clerical garb worn in the Greek and Russian Orthodox Churches.rhein(organic chemistry) An anthraquinone found in rhubarb.rhenian(mineralogy) Containing rheniumrheochrysidin(biochemistry) parietinrheofluidification(physics) Synonym of thixotropy.rheotanAn alloy of copper, nickel and zinc used for electrical resistors and heating coils.rhetorication(obsolete) An instance of rhetoric, or excessive use of rhetoricrhetoricianAn expert or student of rhetoric.rhetoritianObsolete form of rhetorician.rhetoriticianMisspelling of rhetorician.rhicadhesin(biochemistry) A membrane protein in RhizobiumrhinacanthinAny of a group of naphthoquinone esters isolated from the roots of Rhinacanthus nasutus, the snake jasmine.rhinebothriidean(helminthology) Any tapeworm of the order Rhinebothriidearhinencephalon(anatomy) The part of the brain involved with olfaction.rhinion(anatomy) The lower end of the suture between the nasal bones.rhinocerosin(biochemistry) An antibacterial protein present in larvae of a rhinoceros beetle, Oryctes rhinocerosrhinodon(very rare or nonstandard, archaic) A whale shark of the Indian Ocean.rhinoplastician(surgery) One who carries out a rhinoplasty.rhipidion(Christianity) In the Greek Church, the eucharistic fan or flabellum.rhipidoglossan(zoology) Any member of the Rhipidoglossa.rhizarianAny organism of the taxon Rhizariarhizavidin(biochemistry) An avidin dimer present in Rhizobium bacteriarhizobactin(organic chemistry) The siderophore (2S)-2-[2-(1-carboxyethylamino)ethylamino]-6-[(3-carboxy-3-hydroxypropanoyl)amino]hexanoic acid present in RhizobiumrhizobiotoxinA bacterial phytotoxin, produced by Rhizobium japonicum, that causes the root nodules of some soybean plants to become chlorotic.rhizocarpeanBelonging to the Rhizocarpeae, a former taxonomic group of cryptogams.rhizocephalan(zoology) Any member of the Rhizocephala.rhizochalinA sphingolipid-like compound found in the sponge Rhizochalina incrustata.rhizoconcretionThe fossilized form of a tree root.rhizocretion(botany) A concretion on the roots of a plantrhizodeposition(botany) The release of organic compounds from plant roots into the surrounding environmentrhizoferrin(organic chemistry) A siderophore complexone present in the fungus Rhizopus microsporusrhizogen(obsolete, botany) One of a former proposed class of flowering plants growing on the roots of other plants and lacking green foliage.rhizopepsin(biochemistry) A proteinase present in Rosa chinensisrhizoremediationSoil remediation by the use of plant root systemsrhizosecretion(botany) secretion from a rhizomerhizostomeanBelonging to the Rhizostomata, a former taxonomic suborder of jellyfish.rhizotoxinAny rhizotoxic materialrhizotronA transparent underground structure, used to observe plant roots.rhizoxinAn antimitotic agent with antitumor activity, isolated from a pathogenic plant fungus (Rhizopus microsporus) which causes rice seedling blightrhodaminAlternative spelling of rhodamine.rhodation(organic chemistry) Any reaction involving the addition of a rhodium atomrhodeasapogeninA steroidal sapogenin found in the leaves of Rohdea japonica.rhodeoretin(organic chemistry) convolvulinrhodexinA particular steroid glycoside.rhodian(mineralogy) Containing rhodium.rhodochelin(organic chemistry) A siderophore produced by a Rhodococcus.rhodocytin(biochemistry) A protein found in venom of the viper Calloselasma rhodostomarhododendronAny of various flowering shrubs in the genus Rhododendron, especiallyrhodommatin(organic chemistry) A red ommochrome found in the wings of lepidopterarhodomycin(medicine) Any of a group of antibiotics produced by Streptomycesrhodopeptin(biochemistry) Any of a group of antifungal cyclic tetrapeptides present in a Rhodococcusrhodopin(organic chemistry) A particular carotenoid.rhodopsin(biochemistry) A light-sensitive pigment in the rod cells of the retina; it consists of an opsin protein bound to the carotenoid retinalrhodopterinSynonym of pterorhodin.rhodotoxinOne of the grayanotoxins; grayanotoxin I.rhodovibrin(organic chemistry) A particular carotenoid.rhodoxanthin(organic chemistry) A xanthophyll pigment found in many plants, and in bird feathers.rhoeadinAlternative form of rhoeadine.rhoifolinA particular flavone isolated from citrus and other plants.rhombencephalon(neuroanatomy) The hindbrain.rhombencephonMisspelling of rhombencephalon.rhombicdodecahedronAlternative form of rhombic dodecahedron.rhombicosidodecahedron(geometry) An Archimedean solid with 62 regular faces (20 triangles, 30 squares, and 12 pentagons), 60 vertices and 120 edges.rhombicuboctahedron(geometry) An Archimedean solid with eight triangular and eighteen square faces; the small rhombicuboctahedron.rhombidodecahedron(geometry) A nonconvex uniform polyhedron with square faces and sharing symmetry of a dodecahedron.rhombihexahedron(mathematics) Either of two concave polyhedra: the great rhombihexahedron and the small rhombihexahedron.rhombogen(zoology) The infusoriform embryo of a nematoid worm.rhombohedronA prism with six faces, each a rhombus.rhombozoan(zoology) Any of the phylum Rhombozoa of tiny parasites found in the renal appendages of cephalopods.rhophilin(biochemistry) Any of a group of GTP-binding proteinsrhotacisationAlternative spelling of rhotacization.rhotacization(phonology) The act, process, or result of rhotacizing.rhotekin(biochemistry) A scaffold protein that interacts with Rho proteinsrhubarbarinchrysophanic acidrhumbatron(physics, historical) A kind of resonator.rhynchocephalian(zoology) Any of a group of reptiles of the order Rhynchocephalia; a tuatara.rhynchocoelan(zoology) Any member of the Rhynchocoela.rhynchonelliformeanAlternative form of rhynchonelliform.rhynchophoranBelonging to the Rhynchophora.rhyncocephalianMisspelling of rhynchocephalian.rhythmicon(music) An early transposable keyboard instrument capable of playing notes in periodic rhythms proportional to the overtone series of a chosen fundamental pitch.rhythmisationAlternative form of rhythmization.rhythmizationThe process or the result of rhythmizing.rhytonA container from which fluids are intended to be drunk, having one handle and usually a base in the form of a head.ribaudequinAlternative form of ribauldequin.ribauldequinA huge bow fixed on the wall of a fortified town for casting javelins.ribavirin(pharmacology) A synthetic analog of guanosine with chemical formula C₈H₁₂N₄O₅ that inhibits viral nucleic acid synthesis and is used as a broad-spectrum antiviral drug especially in the treatment of respiratory syncytial virus infection and chronic hepatitis C.ribbonA long, narrow strip of material used for decoration of clothing or the hair or gift wrapping.ribbonizationThe process of ribbonizing, or forming into a ribbon.ribinObsolete spelling of ribbon.ribodepletionRNA depletionriboflavin(biochemistry) Yellow or orange-yellow water-soluble compound, a member of the vitamin B complex, that acts as a growth-promoting factor in humans and other animals.riboforinAlternative form of ribophorin.ribolysationAlternative form of ribolyzation.ribolyzationhomogenization in a ribolyserriboncleoproteinMisspelling of ribonucleoprotein.ribonucleoprotein(biochemistry) Any nucleoprotein that contains RNA.ribonucleotoxinAny toxin that interferes with the translation of RNAribonulceoproteinMisspelling of ribonucleoprotein.ribophorin(biochemistry) Any of a group of transmembrane glycoproteins located in the membrane of the rough endoplasmic reticulum, but absent in the membrane of the smooth endoplasmic reticulum.riboproteinSynonym of ribonucleoprotein.ribopuromycylationpuromycylation of ribosomesriboregulation(genetics) genetic regulation by RNAribosilation(biology) The addition of one or more ribose molecules to a protein.ribostamycin(pharmacology) A particular aminoglycoside antibiotic.ribosylation(biochemistry) The attachment of a ribose or ribosyl group to a molecule, especially to a polypeptide or proteinribotoxin(biochemistry) Any of a class of toxic ribonucleasesriburamycinAny of a group of antibiotics that are simplified analogues of liposidomycin.riccardin(organic chemistry) Any of a group of macrocyclic phenolic bisbenzyls present in several plantsrichen(transitive) To make or render rich or richer.richsplain(informal, derogatory) To explain to a poor person (as a middle-class or wealthy person) in a condescending manner, presuming the listener's inferior understanding.ricin(biochemistry, toxicology) An extremely toxic lectin extracted from the castor bean.ricinelaidin(organic chemistry) The glycerin salt of ricinelaidic acid, obtained as a white crystalline waxy substance by treating castor oil with nitrous acid.ricinolein(organic chemistry) The glyceride of ricinoleic acid, present in castor oil.rickshawmanThe person who pulls a rickshaw.riddenpast participle of rideridemanA jazz soloist.riemannianAlternative letter-case form of Riemannian.rifabutin(pharmacology) A bactericidal antibiotic, primarily used in the treatment of tuberculosis, whose effect is based on blocking the DNA-dependent RNA-polymerase of the bacteria.rifampicin(pharmacology) A reddish-brown semisynthetic antibiotic C₄₃H₅₈N₄O₁₂ obtained from the bacterium Amycolaptosis mediterranei, used chiefly to treat tuberculosis, leprosy, and asymptomatic carriers of meningococci.rifampin(pharmacology) US form of rifampicin.rifamycin(pharmacology) Any of a group of antibiotics, a subclass of the ansamycins, which are synthesized either naturally by the bacterium Amycolatopsis mediterranei or artificially.rifaximin(pharmacology) A semisynthetic antibiotic based on rifamycin.riflemanA soldier trained to use a rifle as a primary weapon.riflemenplural of riflemanriflewomanA female rifleman (one who uses a rifle as a weapon).riftsawn(of a log of wood) Sawn radially, so the annual rings are at an angle of nearly 90° to the faces.rigadoon(dance) A quickstep dance for two people.rigation(obsolete) irrigationrigaudonAlternative form of rigadoon.righten(transitive) To make right; correct.rightern(nonstandard, rare) Right (opposite of left).rigidification(uncountable) The process of becoming rigid, stiff or inflexible; of rigidifying.rigidizationThe action, or the result, of making something rigidrigionMisspelling of region.rigorisationRare spelling of rigorization.rigorizationConversion into a mathematically rigorous form.rigourisationRare spelling of rigorization.rigourizationRare spelling of rigorization.riiseinA particular steroid glycoside.rimocidinA macrolide antifungal agent isolated from Streptomyces rimosusrin(ambitransitive, dialectal) To run.rinconAlternative spelling of rincón.ringdown(astronomy) The stage in a black hole merging event where the gravitational wave amplitude reaches its peak.ringmanA male entertainer who works in the ring of a circus.ringmenplural of ringmanringspunManufactured by ring spinning.riparianOf or relating to the bank of a river or stream.ripen(intransitive) to grow ripe; to become mature (said of grain, fruit, flowers etc.)ripon(obsolete, UK, slang) A spur (goad for a horse etc.).rippchenA German form of spare ribsripplon(physics) A quantized capillary-tension wave at the surface of a liquidripponAlternative form of ripon (“a spur”).riproximin(biochemistry) A protein that inactivates certain ribosomes and may have anticancer usesrisbanAlternative form of risbank.risenpast participle of riserishitin(organic chemistry) A terpenoid phytoalexin produced by some plants of the Solanum family, including potato and tomato.rishon(physics) A hypothetical fundamental particle in an early preon model.ristocetin(medicine) A toxic antibiotic, obtained from Amycolatopsis lurida, previously used to treat staphylococcal infectionsritalin(pharmacology) methylphenidate, used to treat attention deficit hyperactivity disorderritanserinA serotonin antagonist with potential uses in treating many neurological disorders.ritten(rare, informal) A young rat.ritualisation(British spelling) Alternative form of ritualization.ritualizationthe act of giving something a ritual meaning or significancerivabirinMisspelling of ribavirin.rivaroxaban(pharmacology) An anticoagulant drug C₁₉H₁₈ClN₃O₅S (trademark Xarelto) that inhibits the activity of factor X and is taken orally especially to prevent and treat deep vein thrombosis and pulmonary embolism and to reduce the risk of stroke related to atrial fibrillation.rivenpast participle of riveriverainOf or pertaining to rivers or their surrounding environments.riverboatmanSomeone who pilots a riverboatriverianPertaining to a river.rivermaiden(mythology, fantasy) A nymph or female spirit associated with a river.rivermanA man who lives or works on a river.riverplainThe alluvial plain of a river.riverrunThe course a river shapes through a landscaperiverwomanA woman who lives or works on a river.riviation(law, Old English law) fishingrixation(obsolete) Scolding; brawling.rizatriptan(medicine) A triptan agonist used in the treatment of migrainern(Internet slang, text messaging) Initialism of right now.roadfan(informal) A road enthusiast.roadmanA man who builds or repairs roads.roadsignAlternative spelling of road sign.roadsmanAlternative form of roadman.roadwornWorn out by long travel on roads, or (figurative) in a damaged or depleted state due to constant or prolonged usage or exertion.roan(of an animal, especially of a horse) Having a coat of a dark base color with individual white hairs mixed in.robbinThe spring of a carriage.robin(organic chemistry) A toxalbumin obtained from the locust tree.robinin(organic chemistry) A flavone glycoside found in the locust Robinia pseudoacacia.robogunA robotic gun; a gun not directly controlled by a human.robolutionThe design and manufacture of revolutionary forms of robots.roboration(obsolete) The act of strengthening.roboticisationAlternative form of roboticization.roboticizationrobotizationrobotisationAlternative spelling of robotization.robotizationThe automation of a system or process by use of robotic devices.roburin(organic chemistry) A particular tannin.robustificationA form of optimization whereby a system is made less sensitive to the effects of random variability, or noise.roccellinA red dyestuff, the sodium salt of a complex azo derivative of naphtol.rockathon(slang) A prolonged session of playing or listening to rock music.rockbunA type of pastry with a crusted sugar coating.rocken(now archaic) Consisting or made of rock or rocky material.rocketmanA rocketeer or rocket scientist.rockmanA quarry worker who handles the blocks of slate.rockmelon(Australia, New Zealand) A type of melon, Cucumis melo var. reticulatus, with sweet orange flesh and a rough skin resembling netting.rockoon(aviation, astronautics) A rocket, powered by solid fuel, that is not lit while on the ground but first carried into the upper atmosphere by a gas-filled balloon, then separated from the balloon and automatically ignited to allow it to achieve a higher altitude.rocksploitation(film) A genre of exploitation film that deals with the lives of rock musicians.rockwrenA small wren endemic to the South Island of New Zealand, Xenicus gilviventris.rodentianSynonym of rodential.rodmanSynonym of rodsman.rodsmanSomeone who carries and holds a levelling staff, or rod, in a surveying party.roentgenAlternative form of röntgen.roentgenization(archaic) X-raying.rogationA deeply serious and somber prayer or entreaty.rogganAlternative form of logan (“balanced stone”).rogitation(rare, uncountable) The act or process of rogitating.rognon(geology) A nunatak rounded by glacial erosion.rohan(obsolete) An East Indian timber tree.roin(obsolete, intransitive) To growl; to roar.rokitamycin(pharmacology) A macrolide antibiotic synthesized from Streptomyces kitasatoensis bacteria.rolldownCapable of being rolled down.rollerman(metalworking) A person employed in a roller mill to insert the hot metal into the rolls.rolleron(aviation) An aerodynamic control surface device, used to control against unwanted rolling (rotation) about the axis of movement. The moving wingtip is self-gyro-stabilized with a rolling bladed wheel catching the airstream, providing the gyroscopic moment.rollsignA roll of flexible material with route numbers or destinations, found on buses or trams.romaction(fiction) Action romance.roman(of type, typography) Upright, as opposed to italic.romanisationAlternative letter-case form of Romanisation: non-Oxford British English standard spelling of Romanization.romanizationAlternative letter-case form of Romanization.romanticisationNon-Oxford British English standard spelling of romanticization.romanticizationThe act or process of romanticizing.romekin(obsolete) A drinking-cup.romidepsinAn anticancer agent obtained from the bacterium Chromobacterium violaceum.romiplastinSynonym of romiplostim.romkinAlternative form of romekin.roninA masterless samurai (who often becomes a mercenary to make ends meet).ronionAlternative form of ronyon.ronson(British, military, slang, obsolete) M4 Sherman tank - due to the proclivity of Shermans to burst into flames from a single hitronyon(obsolete) A mangy or scabby creature.roofgardenAlternative form of roof garden.roonA shred or remnant (usually of cloth).ropemanSomeone who uses a rope.ropesmansomeone who uses a roperopeyarnAlternative form of rope yarn.ropporin(biochemistry) A rhophilin in the flagella of spermroquefortinAlternative form of roquefortine.roquin(genetics) A gene, mutation of which leads to the symptoms of lupusrorationSynonym of dewfall.roriconAlternative spelling of lolicon.roridinAny of a group of trichothecenes produced by several fungirorikonAlternative spelling of lolicon.rosanilinAlternative form of rosaniline.rosarianAn expert in the cultivation and propagation of roses.rosavinA cinnamyl alcohol glycoside found in the plant Rhodiola rosea.roscovitinAlternative form of roscovitine.rosegardenAlternative form of rose garden.roseinSynonym of fuchsine.rosen(obsolete or archaic) Made of or consisting of roses.roseocardin(organic chemistry) A cardiotonic cyclodepsipeptide present in the fungus Trichothecium roseumroseoflavin(organic chemistry) A compound, 8-dimethylamino-8-demethyl-D-riboflavin, related to riboflavinroseotoxin(organic chemistry) A toxic cyclodepsipeptide present in the fungus Trichothecium roseumrosin(organic chemistry) A solid form of resin, obtained from liquid resin by vaporizing its volatile components.rostafuroxinA derivative of digitoxigenin associated with salt gradients across membranesrostralization(zoology) The formation and development of a rostrum (beak)rosuvastatin(organic chemistry, pharmacology) A statin (trademark Crestor) that is administered orally in the form of its calcium salt Ca(C₂₂H₂₇FN₃O₆S)₂ especially to treat hypercholesterolemia.rotablation(surgery) rotary ablation (as a technique to remove plaque from an arteryrotamerisationAlternative form of rotamerization.rotamerization(chemistry) The process, or the result of rotamerizingrotan(Singapore, Malaysia) A long rattan cane used for corporal punishment.rotationA single complete cycle around a centre or an axis.rotatorian(zoology) Any member of the Rotatoria.rotavaporationAlternative form of rotoevaporation.rotavationThe action, or the result, of rotavatingrotavirion(virology) An individual particle of a rotavirus.rotiferanRelating to the rotifers.rotnAbbreviation of rotation.rotodiffusion(physics) rotatory (gyrokinetic) diffusionrotoevaporationevaporation by means of a rotary evaporatorrotoinversion(mathematics, crystallography) The combination of a rotation and an inversion in a point on the axis.rotomation(art) Rotoscoping, especially when assisted by motion capture technology.roton(physics) The quantum of rotation in a superfluidrotonization(physics) The production of rotonsrotoreflection(mathematics, crystallography) rotation (about an axis) and reflection (in a plane perpendicular to that axis)rototranslation(mathematics) Any rigid transformation (Euclidean isometry) that involves rotation and translationrotovaporationAlternative form of rotoevaporation.rottenOf perishable items, overridden with bacteria and other infectious agents.rottlerin(biochemistry) A protein kinase inhibitor derived from the kamala tree (Mallotus philippinensis, syn. Rottlera tinctoria).rotundation(rare) The state or quality of being rotund.roughdrawnpast participle of roughdrawroughen(transitive) To make rough.roughhewnAlternative form of rough-hewn.roughspun(of a garment or cloth) Woven from a coarsely spun yarn, (usually also from a coarse material).rounA speech or conversation (especially rumoured or whispered).rounden(transitive) To make round or roundedroundmanAlternative form of roundsman.roundsmanA worker who makes rounds, especially in order to deliver goods.roundsmenplural of roundsmanroundspersonA worker who makes rounds, especially in order to deliver goods.roundswomanA female worker who makes rounds, especially in order to deliver goods.routemanA salesman who has a particular route.routinisationAlternative form of routinization.routinizationThe process of making something routine.routon(mathematics) A 128-dimensional hypercomplex number.rowanSorbus aucuparia, the European rowan.rowenA stubble field left unploughed until late in the autumn, so that it can be cropped by cattle.rowmotion(mathematics) A certain operation on the order ideals (or antichains) of a finite poset.rownArchaic spelling of roun.roxithromycin(pharmacology) A semisynthetic derivative of erythromycin.roxythromycinMisspelling of roxithromycin.royalisin(biochemistry) A defensin-like peptide found in royal jelly.royalizationThe act or process of royalizing; making royal.ruan(music) A Chinese long-necked fretted round-bodied plucked lute which has, since the mid-20th century, been produced in a family of five sizes (from low to high).ruanqin(chiefly Taiwan) Synonym of ruan.rubberisationAlternative form of rubberization.rubberizationAct or process of rubberizing.rubblizationThe process of rubblizing (turning into rubble).rubdownA quick, energetic massage.rubefactionreddening, the act or process of making red.rubegoldbergian(Canada, US) Achieving a simple objective by absurdly complicated means; overcomplicated, elaborate and impractical.ruberythrinMisspelling of rubrerythrin.rubescensin(organic chemistry) Any of a group of diterpenoids, present in Rabdosia rubescens, that show antitumor activityrubiacin(organic chemistry) A substance found in madder root, and probably identical with ruberythrinic acid.rubiadin(organic chemistry) Any of a group of hydroxylated anthraquinones, but especially 1,3-dihydroxy-2-methyl-9,10-anthracenedionerubian(organic chemistry) One of several colour-producing glycosides found in madder root.rubican(rare, of a horse) Colored mostly red, bay, or black, with flecks of white or grey especially on the flanks.rubiconA limit that when surpassed cannot be returned from, or an action that when taken cannot be reversed.rubidian(mineralogy) Containing rubidiumrubidomycin(pharmacology) Alternative form of daunorubicin.rubificationThe act of making red.rubinAlternative form of rubine (“(obsolete) a ruby”).rubinylation(biochemistry) Modification by reaction with an RUB proteinrubipodanin(biochemistry) Any of a family of cyclic peptides found in the madder Rubia podantharubiretin(chemistry) One of the red dye products extracted from madder root, probably identical with ruberythrinic acid.rubiscolin(biochemistry) Any of a group of opioid peptides formed during digestion of the rubisco protein from spinach leaves.rubitecanA particular drug designed to treat cancer.rubixanthin(organic chemistry) A monocyclic xanthophyll pigment found in rose hips and elsewhere.ruboxistaurin(organic chemistry) A bisindolylmaleimide that inhibits protein kinaserubradirinAn ansamycin antibiotic present in some Streptomyces bacteriarubratoxinAny of a class of mycotoxins found in Penicillium rubrum.rubredoxin(biochemistry) Any of a class of iron-sulfur proteins found in some bacteriarubrerythrin(biochemistry) A non-haem iron protein involved in oxidative stress tolerance in anaerobic bacteriarubricanThe member of a religious order who is responsible for seeing that the rubric (directions for a religious service) is followed.rubricationA form of calligraphy, in medieval manuscripts, in which added text was coloured in red.rubricianSomeone versed in, or strictly adhering to, the rubric or rubrics.rubrocurcuminA red dye formed by the reaction of curcumin with borates in the presence of oxalic acid.rubrofusarin(organic chemistry) The benzochromenone 5,6-dihydroxy-8-methoxy-2-methyl-benzo[g]chromen-4-onerubromycinAny of a class of natural products isolated from actinomycetes and having various antimicrobial and enzyme activity.rubropunctatin(organic chemistry) The pigment (R-(E))-9a-methyl-3-(1-oxohexyl)-6-(1-propenyl)-2H-furo(3,2-g)(2)benzopyran-2,9(9aH)-dione present in MonascusrubrosulphinA toxic metabolite found in a number of fungi.rubylation(biochemistry) Reaction with the protein "RUB" related to ubiquitinruckman(Australian rules football) A ruck; a player who contests rucks.ruckwoman(Australian rules football) A female ruck; a woman who contests rucks.ructation(archaic) A burp.ructionA noisy quarrel or fight.rudderon(aviation) A type of control surface, usually found on flying wing aircraft, consisting of two pairs of panels (one mounted near each wingtip on the wing's trailing edge), with one lying on top of the other sandwich-style; to roll the aircraft, both panels on one wing deflect downwards (increasing the lift of that wing) and both panels on the othe wing deflect upwards (decreasing the lift of that wing), while, to yaw the aircraft, the panels on one wing split apart from each other (the upper panel deflects upwards, and the lower panel deflects downwards), increasing the drag on that wing.ruddlemanSomeone who deals in ruddle (red ochre), usually itinerant and red-stainedruden(transitive) To make rude; make raw, simplified, or more robust; toughen.ruderalizationThe growth of ruderal plants on disturbed landruderationThe act of paving with small stones and mortar.rudimentation(zoology) The process of an organ being reduced to a rudimentary form.ruffianA scoundrel, rascal, or unprincipled, deceitful, brutal and unreliable person.ruffin(dialect) A ruffian.rufiopin(chemistry) A yellowish-red crystalline substance related to anthracene and obtained from opianic acid.rufloxacin(pharmacology) The antibiotic 7-fluoro-6-(4-methylpiperazin-1-yl)-10-oxo-4-thia-1-azatricyclo[7.3.1.0^(5,13)]trideca-5(13),6,8,11-tetraene-11-carboxylic acid.rugburn(uncountable) Rugburns in general.ruggedisationAlternative spelling of ruggedization.ruggedizationThe act or process of ruggedizing.rugosan(paleontology) Synonym of rugose: describing an extinct coral of the order †Rugosa.rugosin(organic chemistry) A particular ellagitannin.rugosinin(organic chemistry) A kauranoid derivative present in Isodon rugosusrugulosinAny of a group of toxins produced by Penicillia.rugulovasin(organic chemistry) Any of a group of alkaloids that are exometabolites of some Penicillium fungiruin(countable, sometimes in the plural) The remains of a destroyed or dilapidated construction, such as a house or castle.ruinationThe state of being ruined, a state of devastation or destruction.rulleyman(archaic) A man who operated a rulley.rullionA shoe made of untanned leather.rumblegumptionAlternative form of rumgumption.rumbullion(obsolete) Synonym of rum, an alcoholic beverage distilled from sugarcane, similar spirits.rumbustion(obsolete) Synonym of rum, an alcoholic beverage distilled from sugarcane, similar spirits.rumenThe first compartment of the stomach of a cow or other ruminants.rumfustianA hot alcoholic drink traditionally made from sherry, eggs, etc. and now made from rum and various spices.rumgumption(UK, dialect, archaic) rough and homely common senserumicin(archaic, organic chemistry) A yellow crystalline substance found in the root of yellow dock (curled dock; Rumex crispus)ruminationThe act of ruminating; i.e. chewing cud.ruminococcinAny of a class of lantibiotics produced by some bacteria of the genus Ruminococcus.rumkinA tailless variety of fowl.runTo move swiftly.runathonA charity event in which participants run a long distanceruncation(obsolete) The act of weeding by hand.runcicantellation(geometry) The simultaneous state of runcination and cantellation.runcicantitruncationThe simultaneous state of runcination, cantellation and truncation.runcination(geometry) An operation in any dimension that cuts a regular polytope at its faces, its edges and its vertices, creating a new facet in place of each face, each edge and each vertex.rundown(gambling) A summary of the horses to be raced on a particular day, with their weights, jockeys, odds, etc.runman(historical) A deserter from a ship of war.runn(India) A tract of sandy or boggy land often overflowed by the tide.runnionAlternative form of ronyon.rupestrianOccurring, or executed on rocks, or on cave wallsruptionA breaking or bursting open; breach; rupture.ruralisationAlternative form of ruralization.ruralizationthe process of making rural.ruralpolitanAn urbanite who moves to the countryside, especially to start an agricultural venture.rurbanOf or pertaining to a location which has both urban and rural characteristics.rurbanizationThe formation of rurban areas (by urban expansion into the countryside).rurn(dialects including Southern US, uncommon) Pronunciation spelling of ruin.ruscinA particular steroid glycoside.ruscogenin(organic chemistry) A chemical compound found in the rhizome of butcher's broom.rushdown(video games) In fighting games, a strategy that aims to overwhelm the opponent through speed and aggression.rushen(archaic) Made of rushes (the plant).russetin(archaic) A russet apple.rustication(uncountable) Residence in the country.rusticizationThe process of rusticizing.rutaleanOf or pertaining to the obsolete Rutales order of plants.rutamycin(pharmacology) Any of a particular group of related macrolide antibiotics.ruthenation(organic chemistry) Any reaction in which a carbon-to-ruthenium bond is formed.ruthenian(mineralogy) Containing rutheniumrutilationA reddening; a red glow.rutin(biochemistry) A flavonoid, found in many plants, that is a glycoside of quercetin and rutinose.rutterkin(obsolete, derogatory) An old crafty fox or beguiler.rxnAbbreviation of reaction.ryanotoxinA peptide having properties similar to that of ryanodine.ryokanA traditional Japanese inn with communal baths and other public areas.ryukinA short deep-bodied fancy goldfish of Chinese origin, with a characteristic hump in the shoulder region.