| abstruseness | (noun) the quality of being unclear or abstruse and hard to understand | Synonyms: obscureness, obscurity, reconditeness |
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| (noun) wisdom that is recondite and abstruse and profound | Synonyms: abstrusity, profoundness, profundity, reconditeness |
| abstrusity | (noun) wisdom that is recondite and abstruse and profound | Synonyms: abstruseness, profoundness, profundity, reconditeness |
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| acarus | (noun) any of several mites of the order Acarina | Synonyms: genus Acarus |
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| adenovirus | (noun) any of a group of viruses including those that in humans cause upper respiratory infections or infectious pinkeye | - |
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| airbrush | (noun) an atomizer to spray paint by means of compressed air | - |
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| allosaurus | (noun) late Jurassic carnivorous dinosaur; similar to but somewhat smaller than tyrannosaurus | Synonyms: allosaur |
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| alphavirus | (noun) an arbovirus of the family Togaviridae that can cause a variety of encephalitis in horses | - |
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| anestrus | (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | Synonyms: anestrum, anoestrum, anoestrus |
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| ankylosaurus | (noun) having the back covered with thick bony plates; thought to have walked with a sprawling gait resembling a lizard's | Synonyms: ankylosaur |
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| anoestrus | (noun) applies to nonhuman mammals: a state or interval of sexual inactivity between two periods of estrus | Synonyms: anestrum, anestrus, anoestrum |
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| apatosaurus | (noun) huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic | Synonyms: apatosaur, Apatosaurus excelsus, brontosaur, brontosaurus, thunder lizard |
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| arborvirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arbovirus |
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| arbovirus | (noun) a large heterogeneous group of RNA viruses divisible into groups on the basis of the virions; they have been recovered from arthropods, bats, and rodents; most are borne by arthropods; they are linked by the epidemiologic concept of transmission between vertebrate hosts by arthropod vectors (mosquitoes, ticks, sandflies, midges, etc.) that feed on blood; they can cause mild fevers, hepatitis, hemorrhagic fever, and encephalitis | Synonyms: arborvirus |
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| arenavirus | (noun) animal viruses belonging to the family Arenaviridae | - |
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| babirusa | (noun) Indonesian wild pig with enormous curved canine teeth | Synonyms: babiroussa, babirussa, Babyrousa Babyrussa |
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| babirussa | (noun) Indonesian wild pig with enormous curved canine teeth | Synonyms: babiroussa, babirusa, Babyrousa Babyrussa |
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| barosaurus | (noun) a dinosaur that could grow to be as tall as a building five stories tall | Synonyms: barosaur |
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| bottlebrush | (noun) a cylindrical brush on a thin shaft that is used to clean bottles | - |
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| brontosaurus | (noun) huge quadrupedal herbivorous dinosaur common in North America in the late Jurassic | Synonyms: apatosaur, apatosaurus, Apatosaurus excelsus, brontosaur, thunder lizard |
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| brush | (noun) a minor short-term fight | Synonyms: clash, encounter, skirmish |
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| (noun) the act of brushing your hair | Synonyms: brushing |
| (noun) the act of brushing your teeth | Synonyms: brushing |
| (noun) contact with something dangerous or undesirable | - |
| (noun) a bushy tail or part of a bushy tail (especially of the fox) | - |
| (noun) an implement that has hairs or bristles firmly set into a handle | - |
| (noun) conducts current between rotating and stationary parts of a generator or motor | - |
| (noun) momentary contact | Synonyms: light touch |
| (noun) a dense growth of bushes | Synonyms: brushwood, coppice, copse, thicket |
| brushing | (noun) the act of brushing your hair | Synonyms: brush |
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| (noun) the act of brushing your teeth | Synonyms: brush |
| brushup | (noun) practice intended to polish performance or refresh the memory | Synonyms: review |
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| brushwood | (noun) a dense growth of bushes | Synonyms: brush, coppice, copse, thicket |
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| (noun) the wood from bushes or small branches | - |
| brushwork | (noun) an artist's distinctive technique of applying paint with a brush | - |
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| brusqueness | (noun) an abrupt discourteous manner | Synonyms: abruptness, curtness, gruffness, shortness |
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| bullrush | (noun) tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America | Synonyms: bulrush, common rush, Juncus effusus, soft rush |
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| (noun) tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa | Synonyms: bulrush, cat's-tail, nailrod, reed mace, reedmace, Typha latifolia |
| bulrush | (noun) tall rush with soft erect or arching stems found in Eurasia, Australia, New Zealand, and common in North America | Synonyms: bullrush, common rush, Juncus effusus, soft rush |
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| (noun) tall marsh plant with cylindrical seed heads that explode when mature shedding large quantities of down; its long flat leaves are used for making mats and chair seats; of North America, Europe, Asia and North Africa | Synonyms: bullrush, cat's-tail, nailrod, reed mace, reedmace, Typha latifolia |
| bunyavirus | (noun) an animal virus belonging to the family Bunyaviridae; can be used as a bioweapon | - |
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| ceratosaurus | (noun) primitive medium-sized theropod; swift-running bipedal carnivorous dinosaur having grasping hands with sharp claws and a short horn between the nostrils; Jurassic in North America | Synonyms: ceratosaur |
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| ceruse | (noun) a poisonous white pigment that contains lead | Synonyms: lead carbonate, white lead |
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| cerussite | (noun) a mineral consisting of lead carbonate that is an important source of lead | Synonyms: white lead ore |
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| chorus | (noun) the part of a song where a soloist is joined by a group of singers | Synonyms: refrain |
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| (noun) any utterance produced simultaneously by a group | - |
| (noun) a group of people assembled to sing together | - |
| (noun) a body of dancers or singers who perform together | Synonyms: chorus line |
| (noun) a company of actors who comment (by speaking or singing in unison) on the action in a classical Greek play | Synonyms: Greek chorus |
| cirrus | (noun) a slender flexible animal appendage as on barnacles or crinoids or many insects; often tactile | - |
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| (noun) a wispy white cloud (usually of fine ice crystals) at a high altitude (4 to 8 miles) | Synonyms: cirrus cloud |
| (noun) usually coiled | Synonyms: cirrhus |
| citrus | (noun) any of numerous fruits of the genus Citrus having thick rind and juicy pulp; grown in warm regions | Synonyms: citrous fruit, citrus fruit |
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| (noun) any of numerous tropical usually thorny evergreen trees of the genus Citrus having leathery evergreen leaves and widely cultivated for their juicy edible fruits having leathery aromatic rinds | Synonyms: citrus tree |
| clothesbrush | (noun) a brush used for cleaning clothing | - |
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| corchorus | (noun) any of various plants of the genus Corchorus having large leaves and cymose clusters of yellow flowers; a source of jute | - |
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| coronavirus | (noun) a viral disease caused by SARS-CoV-2 that caused a global pandemic in 2020 | Synonyms: 2019-nCoV acute respiratory disease, corona, coronavirus disease 2019, COVID-19, novel coronavirus pneumonia, Wuhan coronavirus, Wuhan flu, Wuhan pneumonia, Wuhan virus |
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| coruscation | (noun) a sudden or striking display of brilliance | - |
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| (noun) the occurrence of a small flash or spark | Synonyms: glitter, sparkle |
| corythosaurus | (noun) duck-billed dinosaur with nasal passages that expand into a crest like a hollow helmet | Synonyms: corythosaur |
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| coxsackievirus | (noun) enterovirus causing a disease resembling poliomyelitis but without paralysis | Synonyms: Coxsackie virus |
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| crus | (noun) the leg from the knee to foot | - |
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| crusade | (noun) a series of actions advancing a principle or tending toward a particular end | Synonyms: campaign, cause, drive, effort, movement |
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| crusader | (noun) a disputant who advocates reform | Synonyms: meliorist, reformer, reformist, social reformer |
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| cruse | (noun) small jar; holds liquid (oil or water) | - |
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| crush | (noun) the act of crushing | Synonyms: compaction, crunch |
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| (noun) temporary love of an adolescent | Synonyms: calf love, infatuation, puppy love |
| (noun) a dense crowd of people | Synonyms: jam, press |
| (noun) leather that has had its grain pattern accentuated | Synonyms: crushed leather |
| crusher | (noun) a device that crushes something | - |
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| crushing | (noun) forceful prevention; putting down by power or authority | Synonyms: quelling, stifling, suppression |
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| crust | (noun) the trait of being rude and impertinent; inclined to take liberties | Synonyms: cheekiness, freshness, gall, impertinence, impudence, insolence |
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| (noun) the outer layer of the Earth | Synonyms: Earth's crust |
| (noun) a hard outer layer that covers something | Synonyms: encrustation, incrustation |
| crustacean | (noun) any mainly aquatic arthropod usually having a segmented body and chitinous exoskeleton | - |
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| cytomegalovirus | (noun) any of a group of herpes viruses that enlarge epithelial cells and can cause birth defects; can affect humans with impaired immunological systems | Synonyms: CMV |
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| deinocheirus | (noun) lightly built medium-sized theropod with long limbs and neck | - |
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| diestrus | (noun) (of animals having several estrous cycles in one breeding season) a state or interval of sexual inactivity or quiescence between periods of activity | Synonyms: diestrum |
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| distrust | (noun) the trait of not trusting others | Synonyms: distrustfulness, mistrust |
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| (noun) doubt about someone's honesty | Synonyms: misgiving, mistrust, suspicion |
| distrustfulness | (noun) the trait of not trusting others | Synonyms: distrust, mistrust |
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| drusen | (noun) (plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina | - |
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| echovirus | (noun) any of a group of viruses associated with various diseases including viral meningitis and mild respiratory disorders and diarrhea in newborn infants | - |
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| edaphosaurus | (noun) heavy-bodied reptile with a dorsal sail or crest; of the late Paleozoic | - |
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| edmontosaurus | (noun) duck-billed dinosaur from Canada found as a fossilized mummy with skin | - |
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| electrophorus | (noun) a simple electrostatic generator that generates repeated charges of static electricity | - |
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| encrustation | (noun) a decorative coating of contrasting material that is applied to a surface as an inlay or overlay | Synonyms: incrustation |
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| (noun) a hard outer layer that covers something | Synonyms: crust, incrustation |
| (noun) the formation of a crust | Synonyms: incrustation |
| enterovirus | (noun) any of a group of picornaviruses that infect the gastrointestinal tract and can spread to other areas (especially the nervous system) | - |
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| estrus | (noun) applies to nonhuman mammals: a state or period of heightened sexual arousal and activity | Synonyms: heat, oestrus, rut |
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| extrusion | (noun) squeezing out by applying pressure | Synonyms: expulsion |
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| (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling |
| filovirus | (noun) animal viruses belonging to the family Filoviridae | - |
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| flavivirus | (noun) animal viruses belonging to the family Flaviviridae | - |
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| frustration | (noun) an act of hindering someone's plans or efforts | Synonyms: foiling, thwarting |
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| (noun) the feeling that accompanies an experience of being thwarted in attaining your goals | Synonyms: defeat |
| (noun) a feeling of annoyance at being hindered or criticized | - |
| frustum | (noun) a truncated cone or pyramid; the part that is left when a cone or pyramid is cut by a plane parallel to the base and the apical part is removed | - |
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| gyrus | (noun) a convex fold or elevation in the surface of the brain | Synonyms: convolution |
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| hadrosaurus | (noun) any of numerous large bipedal ornithischian dinosaurs having a horny duck-like bill and webbed feet; may have been partly aquatic | Synonyms: duck-billed dinosaur, hadrosaur |
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| hairbrush | (noun) a brush used to groom a person's hair | - |
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| hepadnavirus | (noun) a group of animal DNA viruses including viruses of ducks and woodchucks and squirrels and others as well as the virus causing hepatitis B in humans | - |
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| herrerasaurus | (noun) a kind of theropod dinosaur found in Argentina | Synonyms: herrerasaur |
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| humerus | (noun) bone extending from the shoulder to the elbow | - |
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| ichthyosaurus | (noun) ichthyosaurs of the Jurassic | - |
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| icterus | (noun) yellowing of the skin and the whites of the eyes caused by an accumulation of bile pigment (bilirubin) in the blood; can be a symptom of gallstones or liver infection or anemia | Synonyms: jaundice |
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| incrustation | (noun) a decorative coating of contrasting material that is applied to a surface as an inlay or overlay | Synonyms: encrustation |
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| (noun) a hard outer layer that covers something | Synonyms: crust, encrustation |
| (noun) the formation of a crust | Synonyms: encrustation |
| inrush | (noun) an inflow | Synonyms: inpour, inpouring |
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| intrusion | (noun) entry to another's property without right or permission | Synonyms: encroachment, trespass, usurpation, violation |
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| (noun) entrance by force or without permission or welcome | - |
| (noun) any entry into an area not previously occupied | Synonyms: encroachment, invasion |
| (noun) rock produced by an intrusive process | - |
| (noun) the forcing of molten rock into fissures or between strata of an earlier rock formation | - |
| intrusiveness | (noun) aggressiveness as evidenced by intruding; by advancing yourself or your ideas without invitation | Synonyms: meddlesomeness, officiousness |
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| kernicterus | (noun) an abnormal accumulation of bile pigment in the brain and other nerve tissue; causes yellow staining and tissue damage | - |
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| kurus | (noun) 100 kurus equal 1 lira in Turkey | Synonyms: piaster, piastre |
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| lyssavirus | (noun) a neurotropic non-arbovirus of the family Rhabdoviridae that causes rabies | - |
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| megalosaurus | (noun) gigantic carnivorous bipedal dinosaur of the Jurassic or early Cretaceous in Europe | Synonyms: megalosaur |
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| mistrust | (noun) the trait of not trusting others | Synonyms: distrust, distrustfulness |
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| (noun) doubt about someone's honesty | Synonyms: distrust, misgiving, suspicion |
| myxovirus | (noun) any of a group of RNA viruses including those that cause influenza and mumps | - |
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| nailbrush | (noun) a brush used to clean a person's fingernails | - |
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| obtrusiveness | (noun) an unwelcome conspicuousness | - |
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| oestrus | (noun) applies to nonhuman mammals: a state or period of heightened sexual arousal and activity | Synonyms: estrus, heat, rut |
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| onrush | (noun) (military) an offensive against an enemy (using weapons) | Synonyms: attack, onset, onslaught |
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| (noun) a forceful forward rush or flow | - |
| orthomyxovirus | (noun) a group of viruses including those causing influenza | - |
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| outthrust | (noun) an outcropping of rock that extends outward | - |
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| overuse | (noun) exploitation to the point of diminishing returns | Synonyms: overexploitation, overutilisation, overutilization |
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| pachycephalosaurus | (noun) bipedal herbivore having 10 inches of bone atop its head; largest boneheaded dinosaur ever found | Synonyms: pachycephalosaur |
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| paintbrush | (noun) a brush used as an applicator (to apply paint) | - |
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| papovavirus | (noun) any of a group of animal viruses associated with or causing papillomas or polyomas | - |
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| papyrus | (noun) a document written on papyrus | - |
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| (noun) tall sedge of the Nile valley yielding fiber that served many purposes in historic times | Synonyms: Cyperus papyrus, Egyptian paper reed, Egyptian paper rush, paper plant, paper rush |
| (noun) paper made from the papyrus plant by cutting it in strips and pressing it flat; used by ancient Egyptians and Greeks and Romans | - |
| paramyxovirus | (noun) a group of viruses including those causing mumps and measles | - |
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| parvovirus | (noun) any of a group of viruses containing DNA in an icosahedral protein shell and causing disease in dogs and cattle; not known to be associated with any human disease | Synonyms: parvo |
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| perusal | (noun) reading carefully with intent to remember | Synonyms: perusing, poring over, studying |
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| perusing | (noun) reading carefully with intent to remember | Synonyms: perusal, poring over, studying |
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