12-Letter Words Starting With P and Ending With R

Explore 245 matching words, including paddleboater, paleoequator, paleoglacier, paleographer, paleosecular.

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All 245 Matching Words

paddleboaterSomeone who travels by paddleboatpaleoequatorAlternative form of palaeoequator.paleoglacierAn ancient glacierpaleographerA person skilled in paleography.paleosecular(geology) Relating to long-term non-periodic irregularities, especially in magnetic field, in the geologic pastpaleoweatherprehistoric weatherpalmoplantar(anatomy) Of, pertaining to, or affecting the palms of the hand and the soles of the foot.pannoniasaurAny tethysaurine mosasauroid of the genus PannoniasauruspantographerOne who uses a pantograph.papercrafterA person who makes artistic objects from paper.paracapsular(anatomy) Alongside a capsuleparacellular(biology) Between cells.paracondylarOver or beyond a condyleparaductularAlongside a ductparaeducatorA paraprofessional educator; a teacher's assistant responsible for helping students in the classroom.parafoveolarThrough or across the foveolaparallelizer(programming) A process or algorithm that parallelizes code.paramuscularAcross or through a muscleparapatellar(anatomy) Located next to the patellaparascapularOver the scapula.paravalvularBeyond a (heart) valveparavascularSynonym of glymphatic.parcelcopterA small-scale unmanned aerial vehicle used to promptly transport a package.pardonmonger(Christianity, archaic, derogatory) A seller of (papal) indulgences.paritaprevir(pharmacology) An acylsulfonamide inhibitor of the NS3-4A serine protease, under investigation for the treatment of hepatitis C.participatorone who participates, a participantpartymeister(informal) One who hosts parties.pasqueflowerAlternative form of pasque flower.passagemaker(nautical) A vessel designed for, or capable of, making a long-distance voyage.patentholderThe holder of a patent.paternalizerOne who paternalizes.pathographerOne who writes a pathography.patternmakerSomeone whose occupation is to make patterns, which are used as a guide in the manufacture of something else.patterroller(African-American Vernacular, historical) A member of a slave patrol.paucilocularHaving few loculipeacebreakerSomeone who disturbs the public peace.peacebuilderA person who creates or restores a state of peace.peanutbutterAlternative spelling of peanut butter.pedotransfer(soil science) The transfer of (data about) soil.pelagibacterAny marine bacterium of the genus PelagibacterpenetrameterAlternative spelling of penetrometer.penetrometerA mechanical device that measures the ease of penetration of an object into a semisolidpenicylinderA small cylinder that can be coated with bacteria as part of scientific experiments with antibiotics.pentadecamerAn oligomer having fifteen subunits.pentalaminarHaving five layerspentalobularHaving five lobules.pentanuclearHaving five nucleipeppershakerAlternative spelling of pepper shaker.perambulator(UK, Ireland, dated) A baby carriage.peregrinatorOne who peregrinates; one who travels about.perialveolar(anatomy) Around the alveoli.pericapsular(anatomy) Around a capsule.pericatheterSurrounding a catheterpericellular(anatomy) Surrounding a cell.pericondylarAround the condyle.periductularAround a ductule.perifistularAround a fistula.periglobularSurrounding a globuleperigranularSurrounding a granuleperimedullarAlternative form of perimedullary.perimodiolarSurrounding the modiolusperimuscular(anatomy) Around a muscle or muscles.perineometerAn instrument for measuring the strength of voluntary contractions of the pelvic floor muscles.peripapillarAlternative form of peripapillary.peripatellarAround the patella.perireceptorSurrounding a receptorperiscapularAround the scapula.perivacuolarSurrounding a vacuoleperivalvularAround a valve.perivascularAround or surrounding a blood vesselperlustratorOne who perlustrates.permitholderOne who holds a permit.perseveratorOne who perseverates.personalizerOne who or that personalizes.perturbatourObsolete form of perturbator.petrobasilarpetrous and basilarpetrographerA person practicing petrography.phenoclusterA cluster of phenotypes (not necessarily relatedphilographerA person devoted to studying and producing written works.phlegmatizerA material added to an explosive to make it less susceptible to detonation and thus more stable and safer to handle and transport.phlyctenular(medicine) Characterized by the presence of small pustules, or whitish elevations resembling pustules.phonographer(obsolete) A person skilled at phonography.phosphodimer(organic chemistry) A dimer in which the two monomers are joined by one or more phosphate groupsphosphodonor(biochemistry) Any substance that donates a phosphoryl groupphosphoester(organic chemistry) A phosphate esterphosphoether(organic chemistry) An ether of a phosphonic acidphosphosugar(biochemistry) Any sugar (or higher carbohydrate) that is esterified with a phosphate groupphotoblocker(biochemistry, lithography) A substance that stops light.photobloggerOne who publishes a photoblog.photocarrier(physics) A photoexcited electrical carrier in a semiconductor.photochopper(electronics) An optoelectronic device that converts a DC input signal into a higher frequency signal.photocounterA device that counts photons.photocouplerAn optoisolator.photoemitterA material that exhibits the photoemission of electrons when illuminatedphotographer(photography) One who takes photographs, typically as an occupation.photonuclear(physics) Of or relating to any nuclear reaction involving a photon.photoplotterAn electromechanical-optical machine that exposes a latent image on a medium by means of a computer-controlled light source.photopolymer(chemistry) Any polymer that reacts to light with a physical or chemical change, used especially for teeth fillingsphotoreactor(chemistry) Any vessel in which a photochemical reaction takes placephotoscannerA device which photographically records the gamma rays passing through tissue that has been injected with a radioactive material.photoshopperSomeone who photoshopsphotostatterOne who photostats.phototriggerA trigger enabled by lightphrasemonger(derogatory) One who uses overelaborate or wordy phrases.physiognomer(archaic) A physiognomist.phytochamber(biology) A chamber in which plants may be grown in controlled conditions of temperature, humidity and lightingphytographerOne who studies phytography.pibrentasvir(pharmacology) An antiviral drug, used with glecaprevir to treat hepatitis C.pickleballerOne who plays pickleball.pickpocketer(chiefly India) A pickpocket.picocellularRelating to or composed of picocells.picoinjectorA picoscale injectorpicospritzerA device that produces an extremely small spray of liquidpiezonuclear(physics) Describing supposed nuclear reactions as a result of mechanical stress (such as cavitation)piezopolymer(physics) A piezoelectric polymer (that can reversibly convert pressure to electricity)piezoscannerA piezoelectric scannerpitterpatter(rare) Alternative form of pitter-patter.planespotterSomeone interested in planespotting.planeswalker(fantasy) A wizard who can travel across planes of existence.plantaflexorAlternative form of plantarflexor.plantationerThe owner of a plantation.pledgemaster(US) A member of a fraternity who takes charge of new pledges.plemyrameter(obsolete) An instrument for measuring changes in water level.pleocellularHaving many more than the usual number of cellsplurilaminarComposed of many thin layersplurilocularSynonym of multilocular.plurisecular(rare, academic) Of or related to a span of several centuries, centuries-old.poisonmongerOne who peddles poison (literally or figuratively).policyholder(insurance) The party to an insurance contract who owns the policy and thus transfers a risk to an insurer (i.e., pays the insurer to take the risk).politicasterA petty politician.polycellularSynonym of multicellular.polycylinderA higher dimensional generalization of a cylinder.polygranularComposed of many microscopic granulespolyvacuolarHaving many vacuolespolyvalvularRelating to many valves, but especially to most or all valves of the heartpolyvascularRelating to, or affecting many blood vesselspontificatorOne who pontificates.pornographerOne who is involved in the creation or dissemination of pornography.possessioner(obsolete) A possessor; a holder of property.postalveolar(phonetics) Articulated with the tongue near or touching the back of the alveolar ridge.postcingularBehind a cingulumpostcochlearBehind the cochleapostcondylarposterior to the condylepostconsumerAfter use by a consumer.postdisasterOccurring after a disaster.postglobularFollowing a globular stagepostmodifier(grammar) A modifier placed after the head of the phrase.postpatellar(anatomy) Posterior to the kneecap.postpetiolar(anatomy, entomology) Of or pertaining to the postpetiolepostreceptor(physiology) Following interaction with a receptorpostscapular(dated, anatomy) Of or pertaining to the postscapulapostsemesterFollowing a semester.posttransferFollowing transferpostvalvulardownstream of a valvepracticewearClothing designed to be worn while practising an activity such as sport or dancing.practicionerMisspelling of practitioner.practitionerA person who practices a profession or art, especially law or medicine.pralltriller(music) A melodic embellishment consisting of the quick alternation of a principal tone with an auxiliary tone above it, usually the next in the scale.preamplifierA voltage amplifier for amplifying a low-level input signal; its output is the input to a higher-level amplifier.preannouncerOne who makes a preannouncement.preappetizerAn amuse-bouche.prearticular(anatomy) Preceding articulationpreauricularIn front of the external ear.preaxostylarRelating to preaxostylidsprecipitatorOne who or that which precipitates (causes something to happen or urges it on with vehemence or rashness).preconciliarIn or of the period before an ecclesiastical council, especially the Second Vatican Council.precuticularThat develops into the cuticlepredecessourObsolete spelling of predecessor.predeveloper(chemistry) A substance used prior to developer.predominatorOne who predominates.preemptionerOne who holds a prior right to purchase certain public land.prefibrillarBefore the fibrillar stage.preglabellar(anatomy) In front of the glabellapreinitiatorAny material that causes preinitiationpremeditatorOne who premeditates.premolecular(especially in combination) Prior to the introduction of a molecular aspect of a subjectprenucleolarRelating to a prenucleoluspreopercular(anatomy) Situated in front of the operculum.prepossessorOne who possesses, or occupies, previously.preprocessor(computing) program that processes its input data to produce output that is used as input to another programprequalifierOne who prequalifies.prescutellar(entomology) In front of the scutellumpreseparatorA device or component that performs preliminary separation.preslaughterBefore slaughter.pressiometer(geology) A device used to measure the stress in soil under pressureprestigiator(obsolete) A conjurer; a prestidigitator.presubicularRelating to the presubiculum.presubocularIn front of, and beneath, the eye (typically of a snake)presurrenderPrior to a surrender.pretensionerA mechanism to retract and tighten a seatbelt, prior to a crash.pretilachlorA particular herbicide.prevaricatorOne who prevaricates.primogenitorAn initial ancestor.prizefighterA professional boxer.processionerOne who takes part in a procession.procuticularRelating to a procuticleprofilometerA device designed to measure the profile, and hence the roughness, of a surface.profitmongerAlternative form of profit monger.proinhibitor(biochemistry) Any substance that initiates inhibitionproliferatorAny agent that causes proliferation.pronilfactor(mathematics) An ergodic nilspace X/R(X) such that there exists an element x of X and a homomorphism H such that (H,X) is a nilsystem.pronunciatorSomeone who pronounces; a pronouncer.proportionerA basic pumping unit consisting of two positive displacement pumps designed to dispense two components at a precisely controlled ratio.propriomotor(physiology) proprioceptive and motorproselytiserNon-Oxford British English standard spelling of proselytizer.proselytizerAgent noun of proselytize; one who proselytizes.protocluster(astronomy) A group of galaxies that are beginning to form a clusterprotofeather(paleontology) The hypothetical precursors of bird feathers, believed to have been grown by certain dinosaurs.protogrammarA rudimentary grammar.protostellar(astronomy) Of or pertaining to a protostar.pseudoacinarResembling the form of an acinuspseudobezoarAn indigestible object intentionally introduced into the digestive system.pseudobulbar(pathology) That is similar to effects related to the brainstem.pseudocellarRelating to arachnids of the genus PseudocelluspseudocolourAn arbitrary colour assigned to each gray level of a monochrome image; used especially in thermographypseudocrater(geology) A volcanic landform formed by wet land being cooled by hot flowing lava.pseudoflowerAn inflorescence produced on a fungus by a pathogen in order to facilitate transmission of spores by insectspseudoheader(Internet) A simplified header used in the TCP and UDP protocols in order to calculate a checksum.pseudoisomer(chemistry) A metastable isomer that is in equilibrium with anotherpseudojasper(mineralogy, dated) A rock that resembles, but is not, jasperpseudoletterA sign or symbol that has the characteristics of a letter but is not found in any alphabet.pseudolinear(mathematics) Both pseudoconvex and pseudoconcave.pseudomartyrOne who dies or suffers like a martyr but (e.g. because of heretical religious views) is not a true martyr.pseudonumberpseudorandom numberpseudoproper(mathematics) Describing any system that has some proper characteristics.pseudoscalar(physics) A quantity that behaves like a scalar, but changes sign under a parity inversionpseudospinor(mathematics, physics) A pseudospin analog of a spinor.pseudosucker(zoology) Any body part that is not a sucker but is used like one.pseudotensor(mathematics, physics) A quantity that transforms like a tensor under a proper rotation but gains an additional change of sign under an improper rotation.pseudotrimerAn apparent trimerpseudotumourAlternative spelling of pseudotumor.pseudovector(mathematics, physics) A quantity that transforms like a vector under a proper rotation but gains an additional change of sign under an improper rotationpsittacosaurAny dinosaur of the family Psittacosauridae; a psittacosaurus.psychogenderpsychological genderpsychrometer(meteorology) Any of several instruments used to measure the relative humidity of the atmosphere; especially a wet-and-dry-bulb hygrometer.pubocapsular(anatomy) Relating to the pubis and capsule.pulsoximeterAlternative form of pulse oximeter.pupillometerA device used to measure the diameter of the pupil of the eye.pupillomotorRelating to the movement of the pupil of the eye.puppetmasterAlternative form of puppet master.purinoceptor(biochemistry) Any of a family of plasma membrane substances involved in cellular functions such as vascular reactivity, apoptosis and cytokine secretionpursuitmeterA device for measuring hand-eye coordination, tasking the user with keeping an object in a certain position by means of manual controls.puzzlemasterSomeone who designs or creates puzzles.pycnonuclear(nuclear physics) Describing nuclear reactions caused by the density of the reactantspyrogeometerAlternative form of pyrgeometer.