| herrerasaur | (noun) a kind of theropod dinosaur found in Argentina | Synonyms: herrerasaurus |
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| herrerasaurus | (noun) a kind of theropod dinosaur found in Argentina | Synonyms: herrerasaur |
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| idiosyncrasy | (noun) a behavioral attribute that is distinctive and peculiar to an individual | Synonyms: foible, mannerism |
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| idocrase | (noun) a green or yellow or brown mineral consisting of a hydrated silicate; it occurs as crystals in limestone and is used a gemstone | Synonyms: vesuvian, vesuvianite |
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| infrasonic | (adjective) having frequencies below those of audible sound | - |
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| infrastructure | (noun) the stock of basic facilities and capital equipment needed for the functioning of a country or area | Synonyms: base |
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| (noun) the basic structure or features of a system or organization | Synonyms: substructure |
| intrasentential | (adjective) of or relating to constituents within a sentence | - |
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| intraspecies | (adjective) arising or occurring within a species; involving the members of one species | Synonyms: intraspecific |
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| intraspecific | (adjective) arising or occurring within a species; involving the members of one species | Synonyms: intraspecies |
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| intrastate | (adjective) relating to or existing within the boundaries of a state | - |
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| irascibility | (noun) a feeling of resentful anger | Synonyms: quick temper, short temper, spleen |
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| irascible | (adjective) characterized by anger | Synonyms: choleric |
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| (adjective) quickly aroused to anger | Synonyms: choleric, hot-tempered, hotheaded, quick-tempered, short-tempered |
| isomerase | (noun) an enzyme that catalyzes its substrate to an isomeric form | - |
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| knotgrass | (noun) low-growing weedy grass with spikelets along the leaf stems | Synonyms: Paspalum distichum |
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| lemongrass | (noun) a tropical grass native to India and Sri Lanka | Synonyms: lemon grass |
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| (noun) an aromatic oil that smells like lemon and is widely used in Asian cooking and in perfumes and medicines | Synonyms: lemon grass, lemongrass oil |
| madras | (noun) a light patterned cotton cloth | - |
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| madrasa | (noun) Muslim schools in Bangladesh and Pakistan | Synonyms: madrasah |
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| madrasah | (noun) Muslim schools in Bangladesh and Pakistan | Synonyms: madrasa |
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| marasca | (noun) Dalmatian bitter wild cherry tree bearing fruit whose juice is made into maraschino liqueur | Synonyms: marasca cherry, maraschino cherry, Prunus cerasus marasca |
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| (noun) small bitter fruit of the marasca cherry tree from whose juice maraschino liqueur is made | - |
| maraschino | (noun) cherry preserved in true or imitation maraschino liqueur | Synonyms: maraschino cherry |
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| (noun) distilled from fermented juice of bitter wild marasca cherries | Synonyms: maraschino liqueur |
| marasmus | (noun) extreme malnutrition and emaciation (especially in children); can result from inadequate intake of food or from malabsorption or metabolic disorders | - |
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| meadowgrass | (noun) any of various grasses that thrive in the presence of abundant moisture | Synonyms: meadow grass |
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| midgrass | (noun) any of various grasses of moderate height which covered the undisturbed prairie in the United States; includes most of the forage grasses of the temperate zone | - |
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| mirasol | (noun) annual sunflower grown for silage and for its seeds which are a source of oil; common throughout United States and much of North America | Synonyms: common sunflower, Helianthus annuus |
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| morass | (noun) a soft wet area of low-lying land that sinks underfoot | Synonyms: mire, quag, quagmire, slack |
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| neurasthenia | (noun) nervous breakdown (not in technical use) | - |
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| neurasthenic | (adjective) of or relating to or suffering from neurasthenia | - |
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| (noun) a person suffering a nervous breakdown | - |
| nonparasitic | (adjective) not parasitic on another organism | Synonyms: free-living, nonsymbiotic |
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| nutgrass | (noun) a widely distributed perennial sedge having small edible nutlike tubers | Synonyms: Cyperus rotundus, nut grass, nut sedge, nutsedge |
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| paederast | (noun) a man who has sex (usually sodomy) with a boy as the passive partner | Synonyms: child molester, pederast |
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| paederastic | (adjective) of homosexuality between a man and a boy | Synonyms: pederastic |
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| paederasty | (noun) sexual relations between a man and a boy (usually anal intercourse with the boy as a passive partner) | Synonyms: pederasty |
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| paraphrase | (noun) rewording for the purpose of clarification | Synonyms: paraphrasis |
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| (verb) express the same message in different words | Synonyms: rephrase, reword |
| paraphrasis | (noun) rewording for the purpose of clarification | Synonyms: paraphrase |
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| paraphrastic | (adjective) altered by paraphrasing | - |
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| parasail | (noun) parachute that will lift a person up into the air when it is towed by a motorboat or a car | - |
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| parasailing | (noun) gliding in a parasail | Synonyms: paragliding |
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| parasitaemia | (noun) a condition in which parasites are present in the blood | Synonyms: parasitemia |
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| parasite | (noun) an animal or plant that lives in or on a host (another animal or plant); it obtains nourishment from the host without benefiting or killing the host | - |
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| (noun) a follower who hangs around a host (without benefit to the host) in hope of gain or advantage | Synonyms: leech, sponge, sponger |
| parasitemia | (noun) a condition in which parasites are present in the blood | Synonyms: parasitaemia |
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| parasitic | (adjective) of or pertaining to epenthesis | Synonyms: epenthetic |
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| (adjective) relating to or caused by parasites | Synonyms: parasitical |
| (adjective) of plants or persons; having the nature or habits of a parasite or leech; living off another | Synonyms: bloodsucking, leechlike, parasitical |
| parasitical | (adjective) relating to or caused by parasites | Synonyms: parasitic |
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| (adjective) of plants or persons; having the nature or habits of a parasite or leech; living off another | Synonyms: bloodsucking, leechlike, parasitic |
| parasitically | (adverb) in a parasitic manner | - |
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| parasiticidal | (adjective) capable of expelling or destroying parasitic worms | Synonyms: anthelminthic, anthelmintic, helminthic |
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| parasitism | (noun) the relation between two different kinds of organisms in which one receives benefits from the other by causing damage to it (usually not fatal damage) | - |
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| parasol | (noun) a handheld collapsible source of shade | Synonyms: sunshade |
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| parasympathetic | (adjective) of or relating to the parasympathetic nervous system | - |
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| (noun) originates in the brain stem and lower part of the spinal cord; opposes physiological effects of the sympathetic nervous system: stimulates digestive secretions; slows the heart; constricts the pupils; dilates blood vessels | Synonyms: parasympathetic nervous system |
| parasympathomimetic | (adjective) having an effect similar to that resulting from stimulation of the parasympathetic nervous system | - |
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| pederast | (noun) a man who has sex (usually sodomy) with a boy as the passive partner | Synonyms: child molester, paederast |
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| pederastic | (adjective) of homosexuality between a man and a boy | Synonyms: paederastic |
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| pederasty | (noun) sexual relations between a man and a boy (usually anal intercourse with the boy as a passive partner) | Synonyms: paederasty |
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| periphrasis | (noun) a style that involves indirect ways of expressing things | Synonyms: ambage, circumlocution |
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| periphrastic | (adjective) roundabout and unnecessarily wordy | Synonyms: ambagious, circumlocutious, circumlocutory |
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| phrasal | (adjective) of or relating to or functioning as a phrase | - |
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| phrase | (noun) dance movements that are linked in a single choreographic sequence | - |
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| (noun) an expression consisting of one or more words forming a grammatical constituent of a sentence | - |
| (noun) a short musical passage | Synonyms: musical phrase |
| (noun) an expression whose meanings cannot be inferred from the meanings of the words that make it up | Synonyms: idiom, idiomatic expression, phrasal idiom, set phrase |
| (verb) put into words or an expression | Synonyms: articulate, formulate, give voice, word |
| (verb) divide, combine, or mark into phrases | - |
| phraseology | (noun) the manner in which something is expressed in words | Synonyms: choice of words, diction, phrasing, verbiage, wording |
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| phrasing | (noun) the grouping of musical phrases in a melodic line | - |
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| (noun) the manner in which something is expressed in words | Synonyms: choice of words, diction, phraseology, verbiage, wording |
| polymerase | (noun) an enzyme that catalyzes the formation of new DNA and RNA from an existing strand of DNA or RNA | - |
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| praseodymium | (noun) a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process | Synonyms: atomic number 59, Pr |
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| procrastinate | (verb) postpone doing what one should be doing | Synonyms: dilly-dally, dillydally, drag one's feet, drag one's heels, shillyshally, stall |
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| (verb) postpone or delay needlessly | - |
| procrastination | (noun) the act of procrastinating; putting off or delaying or deferring an action to a later time | Synonyms: cunctation, shillyshally |
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| (noun) slowness as a consequence of not getting around to it | Synonyms: dilatoriness |
| procrastinator | (noun) someone who postpones work (especially out of laziness or habitual carelessness) | Synonyms: cunctator, postponer |
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| quackgrass | (noun) European grass spreading rapidly by creeping rhizomes; naturalized in North America as a weed | Synonyms: Agropyron repens, couch grass, dog grass, quack grass, quick grass, witch grass, witchgrass |
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| quadrasonic | (adjective) of or relating to quadraphony | Synonyms: quadraphonic, quadriphonic, quadrisonic |
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| rascal | (noun) one who is playfully mischievous | Synonyms: imp, monkey, rapscallion, scalawag, scallywag, scamp |
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| (noun) a deceitful and unreliable scoundrel | Synonyms: knave, rapscallion, rogue, scalawag, scallywag, varlet |
| rascality | (noun) reckless or malicious behavior that causes discomfort or annoyance in others | Synonyms: devilment, devilry, deviltry, mischief-making, mischief, mischievousness, roguery, roguishness, shenanigan |
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| (noun) the trait of indulging in disreputable pranks | Synonyms: prankishness, roguishness |
| (noun) the quality of being a slippery rascal | Synonyms: shiftiness, slipperiness, trickiness |
| rascally | (adjective) lacking principles or scruples | Synonyms: blackguardly, roguish, scoundrelly |
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| (adjective) playful in an appealingly bold way | Synonyms: devilish, roguish |
| rase | (verb) tear down so as to make flat with the ground | Synonyms: dismantle, level, pull down, raze, take down, tear down |
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| rash | (adjective) marked by defiant disregard for danger or consequences | Synonyms: foolhardy, heady, reckless |
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| (adjective) imprudently incurring risk | - |
| (noun) a series of unexpected and unpleasant occurrences | Synonyms: blizzard |
| (noun) any red eruption of the skin | Synonyms: efflorescence, roseola, skin rash |
| rasher | (noun) a commercially important fish of the Pacific coast of North America | Synonyms: Sebastes miniatus, vermillion rockfish |
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| rashly | (adverb) in a hasty and foolhardy manner | Synonyms: headlong |
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| rashness | (noun) the trait of giving little thought to danger | Synonyms: foolhardiness, recklessness |
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| (noun) the trait of acting rashly and without prudence | Synonyms: heedlessness, mindlessness |
| rasp | (noun) a coarse file with sharp pointed projections | Synonyms: wood file |
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| (noun) uttering in an irritated tone | Synonyms: rasping |
| (verb) utter in a grating voice | - |
| (verb) scrape with a rasp | - |
| raspberry | (noun) a cry or noise made to express displeasure or contempt | Synonyms: bird, boo, Bronx cheer, hiss, hoot, razz, razzing, snort |
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| (noun) red or black edible aggregate berries usually smaller than the related blackberries | - |
| (noun) woody brambles bearing usually red but sometimes black or yellow fruits that separate from the receptacle when ripe and are rounder and smaller than blackberries | Synonyms: raspberry bush |
| raspiness | (noun) (of sound) The state or characteristic of being rough or raw, especially used to describe vocal quality. | - |
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| rasping | (adjective) unpleasantly harsh or grating in sound | Synonyms: grating, gravelly, raspy, rough, scratchy |
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| (noun) uttering in an irritated tone | Synonyms: rasp |
| raspingly | (adverb) in a harsh and grating manner | Synonyms: gratingly, harshly |
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| raspy | (adjective) unpleasantly harsh or grating in sound | Synonyms: grating, gravelly, rasping, rough, scratchy |
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| rassling | (noun) the sport of hand-to-hand struggle between unarmed contestants who try to throw each other down | Synonyms: grappling, wrestling |
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| raster | (noun) the rectangular formation of parallel scanning lines that guide the electron beam on a television screen or a computer monitor | - |
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| rasterize | (verb) convert (an image) into pixels | - |
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| rephrase | (verb) express the same message in different words | Synonyms: paraphrase, reword |
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| rephrasing | (noun) changing a particular word or phrase | Synonyms: recasting, rewording |
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| ribgrass | (noun) an Old World plantain with long narrow ribbed leaves widely established in temperate regions | Synonyms: buckthorn, English plantain, narrow-leaved plantain, Plantago lanceolata, ribwort, ripple-grass |
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| ricegrass | (noun) any grass of the genus Oryzopsis | Synonyms: rice grass |
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| ryegrass | (noun) any of several annual or perennial Eurasian grasses | Synonyms: rye grass |
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| saccharase | (noun) an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose | Synonyms: invertase, sucrase |
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| sassafras | (noun) dried root bark of the sassafras tree | - |
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| (noun) yellowwood tree with brittle wood and aromatic leaves and bark; source of sassafras oil; widely distributed in eastern North America | Synonyms: Sassafras albidum, sassafras tree |
| seagrass | (noun) any of various seaweeds that grow underwater in shallow beds | - |
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| semiparasite | (noun) a parasitic plant that contains some chlorophyll and therefore is capable of photosynthesis | Synonyms: hemiparasite |
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| semiparasitic | (adjective) of or relating to plants that are semiparasites | - |
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| shortgrass | (noun) any of various grasses that are short and can tolerate drought conditions; common on the dry upland plains just east of the Rocky Mountains | Synonyms: short-grass |
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| silkgrass | (noun) valuable forage grass of dry upland areas and plains of western North America to northern Mexico | Synonyms: Indian millet, mountain rice, Oryzopsis hymenoides, silk grass |
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| sucrase | (noun) an enzyme that catalyzes the hydrolysis of sucrose into glucose and fructose | Synonyms: invertase, saccharase |
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| supergrass | (noun) a police informer who implicates many people | Synonyms: grass |
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| suprasegmental | (adjective) pertaining to a feature of speech that extends over more than a single speech sound | - |
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| tallgrass | (noun) any of various grasses that are tall and that flourish with abundant moisture | Synonyms: tall-grass |
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| telomerase | (noun) an enzyme in eukaryotic cells that can add telomeres to the ends of chromosomes after they divide | - |
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| teras | (noun) (medicine) a grossly malformed and usually nonviable fetus | Synonyms: monster |
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| terrasse | (verb) provide (a house) with a terrace | Synonyms: terrace |
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