| astringence | (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringency |
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| astringency | (noun) the ability to contract or draw together soft body tissues to check blood flow or restrict secretion of fluids | Synonyms: stypsis |
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| (noun) a sharp astringent taste; the taste experience when a substance causes the mouth to pucker | Synonyms: astringence |
| astringent | (noun) a drug that causes contraction of body tissues and canals | Synonyms: astringent drug, styptic |
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| astrobiology | (noun) the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life | Synonyms: exobiology, space biology |
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| astrocyte | (noun) comparatively large neuroglial cell | - |
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| astrodome | (noun) a transparent dome on top of an airplane where the navigator can make celestial observations | - |
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| astrodynamics | (noun) the branch of astronomy that studies the motion of natural and artificial bodies in space | - |
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| astrogator | (noun) the navigator of a spacecraft | - |
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| astroglia | (noun) tissue consisting of large stellate neuroglial cells | Synonyms: macroglia |
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| astrolabe | (noun) an early form of sextant | - |
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| astrolatry | (noun) the worship of planets or stars | Synonyms: worship of heavenly bodies |
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| astrologer | (noun) someone who predicts the future by the positions of the planets and sun and Moon | Synonyms: astrologist |
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| astrologist | (noun) someone who predicts the future by the positions of the planets and sun and Moon | Synonyms: astrologer |
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| astrology | (noun) a pseudoscience claiming divination by the positions of the planets and sun and moon | Synonyms: star divination |
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| astrometry | (noun) the branch of astronomy that deals with the measurement of the position and motion of celestial bodies | - |
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| astronaut | (noun) a person trained to travel in a spacecraft | Synonyms: cosmonaut, spaceman |
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| astronautics | (noun) the theory and practice of navigation through air or space | Synonyms: aeronautics |
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| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| astronomer | (noun) a physicist who studies astronomy | Synonyms: stargazer, uranologist |
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| astronomy | (noun) the branch of physics that studies celestial bodies and the universe as a whole | Synonyms: uranology |
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| astrophysicist | (noun) an astronomer who studies the physical properties of celestial bodies | - |
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| astrophysics | (noun) the branch of astronomy concerned with the physical and chemical properties of celestial bodies | - |
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| astuteness | (noun) intelligence manifested by being astute (as in business dealings) | Synonyms: perspicaciousness, perspicacity, shrewdness |
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| (noun) the intellectual ability to penetrate deeply into ideas | Synonyms: deepness, depth, profoundness, profundity |
| asystole | (noun) absence of systole; failure of the ventricles of the heart to contract (usually caused by ventricular fibrillation) with consequent absence of the heart beat leading to oxygen lack and eventually to death | Synonyms: cardiac arrest, cardiopulmonary arrest |
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| atavist | (noun) an organism that has the characteristics of a more primitive type of that organism | Synonyms: throwback |
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| atheist | (noun) someone who does not believe in the existence of a god | - |
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| atorvastatin | (noun) an oral drug (trade name Lipitor) that is effective in lowering triglycerides; potent in reducing LDL cholesterol because higher doses can be given | Synonyms: Lipitor |
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| attestant | (noun) (law) a person who attests to the genuineness of a document or signature by adding their own signature | Synonyms: attestator, attestor, witness |
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| (noun) someone who affirms or vouches for the correctness or truth or genuineness of something | Synonyms: attester |
| attestation | (noun) the action of bearing witness | - |
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| (noun) the evidence by which something is attested | - |
| attestator | (noun) (law) a person who attests to the genuineness of a document or signature by adding their own signature | Synonyms: attestant, attestor, witness |
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| attester | (noun) someone who affirms or vouches for the correctness or truth or genuineness of something | Synonyms: attestant |
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| attestor | (noun) (law) a person who attests to the genuineness of a document or signature by adding their own signature | Synonyms: attestant, attestator, witness |
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| austenite | (noun) a solid solution of ferric carbide or carbon in iron; cools to form pearlite or martensite | - |
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| austereness | (noun) extreme plainness | Synonyms: severeness, severity |
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| austerity | (noun) the trait of great self-denial (especially refraining from worldly pleasures) | Synonyms: asceticism, nonindulgence |
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| austral | (noun) the basic unit of money in Argentina; equal to 100 centavos | - |
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| australopithecine | (noun) any of several extinct humanlike bipedal primates with relatively small brains of the genus Australopithecus; from 1 to 4 million years ago | - |
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| automobilist | (noun) someone who drives (or travels in) an automobile | Synonyms: motorist |
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| autoplasty | (noun) surgical repair by using tissue from another part of the patient's own body | - |
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| (noun) tissue that is taken from one site and grafted to another site on the same person | Synonyms: autograft |
| autostereotype | (noun) the standardized mental picture held in common by members of a cultural group depicting an oversimplified image of themselves and their behaviour. | - |
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| autostrada | (noun) an expressway in an Italian-speaking country | - |
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| autosuggestion | (noun) a system for self-improvement developed by Emile Coue which was popular in the 1920s and 1930s | Synonyms: auto-suggestion, self-suggestion |
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| backblast | (noun) backfire from a recoilless weapon | Synonyms: back-blast |
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| backrest | (noun) a support that you can lean against while sitting | Synonyms: back |
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| backstage | (noun) a stage area out of sight of the audience | Synonyms: offstage, wing |
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| backstairs | (noun) a second staircase at the rear of a building | - |
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| backstay | (noun) a stay that supports the back of something | - |
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| backstitch | (noun) an overlapping stitch made by starting the next stitch at the middle of the preceding one | - |
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| backstop | (noun) a precaution in case of an emergency | - |
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| (noun) (baseball) a fence or screen (as behind home plate) to prevent the ball from traveling out of the playing field | - |
| (noun) (baseball) the person who plays the position of catcher | Synonyms: catcher |
| backstroke | (noun) a swimming stroke that resembles the crawl except the swimmer lies on his or her back | - |
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| backstroker | (noun) someone who swims the backstroke | - |
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| bacteriologist | (noun) a biologist who studies bacteria | - |
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| bacteriostasis | (noun) inhibition of the growth of bacteria | - |
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| bacteriostat | (noun) a chemical or biological material that inhibits bacterial growth | - |
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| balanoposthitis | (noun) inflammation of both the head of the penis and the foreskin | - |
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| ballast | (noun) any heavy material used to stabilize a ship or airship | - |
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| (noun) an electrical device for starting and regulating fluorescent and discharge lamps | Synonyms: light ballast |
| (noun) a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations) | Synonyms: ballast resistor, barretter |
| (noun) an attribute that tends to give stability in character and morals; something that steadies the mind or feelings | - |
| (noun) coarse gravel laid to form a bed for streets and railroads | - |
| ballista | (noun) ancient missile weapon that throws bolts or stones | Synonyms: bolt thrower |
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| ballistics | (noun) the science of flight dynamics | - |
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| (noun) the trajectory of an object in free flight | Synonyms: ballistic trajectory |
| ballistocardiogram | (noun) a graphical recording made by a ballistocardiograph | - |
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| ballistocardiograph | (noun) a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles | Synonyms: cardiograph |
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| balloonist | (noun) someone who flies a balloon | - |
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| baluster | (noun) one of a number of closely spaced supports for a railing | - |
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| balusters | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balustrade, banister, bannister, handrail |
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| balustrade | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, banister, bannister, handrail |
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| bandmaster | (noun) the conductor of a band | - |
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| bandstand | (noun) a platform where a (brass) band can play in the open air | Synonyms: outdoor stage, stand |
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| banister | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, balustrade, bannister, handrail |
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| bannister | (noun) a railing at the side of a staircase or balcony to prevent people from falling | Synonyms: balusters, balustrade, banister, handrail |
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| baptistery | (noun) bowl for baptismal water | Synonyms: baptismal font, baptistry, font |
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| baptistry | (noun) bowl for baptismal water | Synonyms: baptismal font, baptistery, font |
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| barnstormer | (noun) a pilot who travels around the country giving exhibits of stunt flying and parachuting | Synonyms: stunt flier, stunt pilot |
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| (noun) an actor who travels around the country presenting plays | Synonyms: play-actor, playactor, trouper |
| barrister | (noun) a British or Canadian lawyer who speaks in the higher courts of law on behalf of either the defense or prosecution | - |
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| bassist | (noun) a musician who play the bass viol | - |
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| bassoonist | (noun) a musician who plays the bassoon | - |
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| bast | (noun) (botany) tissue that conducts synthesized food substances (e.g., from leaves) to parts where needed; consists primarily of sieve tubes | Synonyms: phloem |
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| (noun) strong woody fibers obtained especially from the phloem of from various plants | Synonyms: bast fiber |
| bastard | (noun) derogatory term for a variation that is not genuine; something irregular or inferior or of dubious origin | Synonyms: mongrel |
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| (noun) insulting terms of address for people who are stupid or irritating or ridiculous | Synonyms: asshole, cocksucker, dickhead, mother fucker, motherfucker, prick, shit, SOB, son of a bitch, whoreson |
| (noun) the illegitimate offspring of unmarried parents | Synonyms: by-blow, illegitimate, illegitimate child, love child, whoreson |
| bastardisation | (noun) an act that debases or corrupts | Synonyms: bastardization |
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| bastardization | (noun) an act that debases or corrupts | Synonyms: bastardisation |
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| (noun) declaring or rendering bastard | - |
| bastardy | (noun) the status of being born to parents who were not married | Synonyms: bar sinister, illegitimacy |
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| baste | (noun) a loose temporary sewing stitch to hold layers of fabric together | Synonyms: basting, basting stitch, tacking |
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| baster | (noun) a tube with a rubber bulb used to take up and release melted fat or gravy in order to moisten roasting meat | - |
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| (noun) a sewer who fastens a garment with long loose stitches | Synonyms: tacker |
| (noun) a cook who bastes roasting meat with melted fat or gravy | - |
| bastille | (noun) a jail or prison (especially one that is run in a tyrannical manner) | - |
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| bastinado | (noun) a form of torture in which the soles of the feet are beaten with whips or cudgels | Synonyms: falanga |
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| (noun) a cudgel used to give someone a beating on the soles of the feet | - |
| basting | (noun) moistening a roast as it is cooking | - |
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| (noun) a loose temporary sewing stitch to hold layers of fabric together | Synonyms: baste, basting stitch, tacking |
| bastion | (noun) projecting part of a rampart or other fortification | - |
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| (noun) a stronghold into which people could go for shelter during a battle | Synonyms: citadel |
| (noun) a group that defends a principle | - |
| bastnaesite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnasite |
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| bastnasite | (noun) a yellow-to-brown mineral that is a source of rare earth elements | Synonyms: bastnaesite |
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| batiste | (noun) a thin plain-weave cotton or linen fabric; used for shirts or dresses | - |
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| beanfeast | (noun) an annual dinner party given by an employer for the employees | - |
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| beanstalk | (noun) stem of a bean plant | - |
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| beast | (noun) a living organism characterized by voluntary movement | Synonyms: animal, animate being, brute, creature, fauna |
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| (noun) a cruelly rapacious person | Synonyms: brute, savage, wildcat, wolf |
| beastliness | (noun) unpleasant nastiness; used especially of nasty weather | - |
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| (noun) the quality of being deliberately mean | Synonyms: meanness |
| bedpost | (noun) any of 4 vertical supports at the corners of a bedstead | - |
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| bedrest | (noun) confinement to bed continuously (as in the case of some sick or injured persons) | Synonyms: bed rest |
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| bedstead | (noun) the framework of a bed | Synonyms: bedframe |
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| bedstraw | (noun) any of several plants of the genus Galium | - |
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| beefsteak | (noun) a beef steak usually cooked by broiling | - |
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| behaviorist | (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviourist |
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| behaviourist | (noun) a psychologist who subscribes to behaviorism | Synonyms: behaviorist |
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| behest | (noun) an authoritative command or request | - |
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