| at | (noun) 100 at equal 1 kip in Laos | - |
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| atar | (noun) essential oil or perfume obtained from flowers | Synonyms: athar, attar, ottar |
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| ataractic | (noun) a drug used to reduce stress or tension without reducing mental clarity | Synonyms: antianxiety agent, ataractic agent, ataractic drug, tranquilizer, tranquilliser, tranquillizer |
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| ataraxia | (noun) peace of mind | - |
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| ataraxis | (noun) the absence of mental stress or anxiety | Synonyms: heartsease, peace, peace of mind, peacefulness, repose, serenity |
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| atavism | (noun) a reappearance of an earlier characteristic | Synonyms: reversion, throwback |
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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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| ataxia | (noun) inability to coordinate voluntary muscle movements; unsteady movements and staggering gait | Synonyms: ataxy, dyssynergia, motor ataxia |
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| ataxy | (noun) inability to coordinate voluntary muscle movements; unsteady movements and staggering gait | Synonyms: ataxia, dyssynergia, motor ataxia |
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| atelectasis | (noun) collapse of an expanded lung (especially in infants); also failure of pulmonary alveoli to expand at birth | - |
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| ateleiosis | (noun) a form of infantilism characterized by physical underdevelopment but normal intelligence | Synonyms: ateliosis |
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| atelier | (noun) a studio especially for an artist or designer | Synonyms: artist's workroom |
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| ateliosis | (noun) a form of infantilism characterized by physical underdevelopment but normal intelligence | Synonyms: ateleiosis |
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| atenolol | (noun) an oral beta blocker (trade name Tenormin) used in treating hypertension and angina; has adverse side effects (depression and exacerbation of congestive heart failure etc.) | Synonyms: Tenormin |
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| athanor | (noun) a furnace that feeds itself so as to maintain a uniform temperature; used by alchemists | - |
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| athar | (noun) essential oil or perfume obtained from flowers | Synonyms: atar, attar, ottar |
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| atheism | (noun) a lack of belief in the existence of God or gods | - |
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| atheist | (noun) someone who does not believe in the existence of a god | - |
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| athenaeum | (noun) a place where reading materials are available | Synonyms: atheneum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: atheneum |
| atheneum | (noun) a place where reading materials are available | Synonyms: athenaeum |
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| (noun) a literary or scientific association for the promotion of learning | Synonyms: athenaeum |
| atherodyde | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: athodyd, flying drainpipe, ramjet, ramjet engine |
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| atherogenesis | (noun) the formation of atheromas on the walls of the arteries as in atherosclerosis | - |
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| atheroma | (noun) a fatty deposit in the intima (inner lining) of an artery; can obstruct blood flow | - |
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| atherosclerosis | (noun) a stage of arteriosclerosis involving fatty deposits (atheromas) inside the arterial walls, thus narrowing the arteries | Synonyms: coronary artery disease |
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| athetosis | (noun) a continuous succession of slow, writhing, involuntary movements of the hands and feet and other body parts | - |
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| athlete | (noun) a person trained to compete in sports | Synonyms: jock |
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| athleticism | (noun) intense energy | Synonyms: strenuosity |
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| athletics | (noun) an active diversion requiring physical exertion and competition | Synonyms: sport |
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| (noun) participation in sports events as an extracurricular activity | - |
| (noun) a contest between athletes | Synonyms: athletic competition, athletic contest |
| athodyd | (noun) a simple type of jet engine; must be launched at high speed | Synonyms: atherodyde, flying drainpipe, ramjet, ramjet engine |
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| atlas | (noun) a figure of a man used as a supporting column | Synonyms: telamon |
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| (noun) the 1st cervical vertebra | Synonyms: atlas vertebra |
| (noun) a collection of maps in book form | Synonyms: book of maps, map collection |
| atm | (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade | Synonyms: atmosphere, standard atmosphere, standard pressure |
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| atmometer | (noun) an instrument that measures rate of evaporation of water | Synonyms: evaporometer |
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| atmoradiograph | (noun) a device which measures the frequency of occurrence of atmospherics. | - |
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| atmosphere | (noun) a distinctive but intangible quality surrounding a person or thing | Synonyms: air, aura |
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| (noun) the mass of air surrounding the Earth | Synonyms: air |
| (noun) the envelope of gases surrounding any celestial body | - |
| (noun) a unit of pressure: the pressure that will support a column of mercury 760 mm high at sea level and 0 degrees centigrade | Synonyms: atm, standard atmosphere, standard pressure |
| (noun) the weather or climate at some place | Synonyms: atmospheric state |
| (noun) a particular environment or surrounding influence | Synonyms: ambiance, ambience |
| atmospherics | (noun) a crackling or hissing noise caused by electrical interference | Synonyms: atmospheric static, static |
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| atole | (noun) eaten as mush or as a thin gruel | - |
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| atoll | (noun) an island consisting of a circular coral reef surrounding a lagoon | - |
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| atom | (noun) (physics and chemistry) the smallest component of an element having the chemical properties of the element | - |
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| (noun) (nontechnical usage) a tiny piece of anything | Synonyms: corpuscle, molecule, mote, particle, speck |
| atomisation | (noun) separating something into fine particles | Synonyms: atomization, fragmentation |
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| (noun) annihilation by reducing something to atoms | Synonyms: atomization |
| atomiser | (noun) a dispenser that turns a liquid (such as perfume) into a fine mist | Synonyms: atomizer, nebuliser, nebulizer, spray, sprayer |
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| atomism | (noun) (chemistry) any theory in which all matter is composed of tiny discrete finite indivisible indestructible particles | Synonyms: atomic theory, atomist theory, atomistic theory |
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| (noun) (psychology) a theory that reduces all mental phenomena to simple elements (sensations and feelings) that form complex ideas by association | - |
| atomization | (noun) separating something into fine particles | Synonyms: atomisation, fragmentation |
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| (noun) annihilation by reducing something to atoms | Synonyms: atomisation |
| atomizer | (noun) a dispenser that turns a liquid (such as perfume) into a fine mist | Synonyms: atomiser, nebuliser, nebulizer, spray, sprayer |
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| atonalism | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonality |
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| atonality | (noun) the absence of a key; alternative to the diatonic system | Synonyms: atonalism |
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| atonement | (noun) the act of atoning for sin or wrongdoing (especially appeasing a deity) | Synonyms: expiation, propitiation |
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| (noun) compensation for a wrong | Synonyms: expiation, satisfaction |
| atonia | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonicity, atony |
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| atonicity | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atony |
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| atony | (noun) lack of normal muscular tension or tonus | Synonyms: amyotonia, atonia, atonicity |
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| atopognosia | (noun) absence or loss of topognosia; inability to locate correctly a point of touch | Synonyms: atopognosis |
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| atopognosis | (noun) absence or loss of topognosia; inability to locate correctly a point of touch | Synonyms: atopognosia |
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| atopy | (noun) an allergic reaction that becomes apparent in a sensitized person only minutes after contact | Synonyms: atopic allergy, immediate allergy, type I allergic reaction |
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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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| atrazine | (noun) a synthetic compound derived from triazine that is widely used as an agricultural herbicide | - |
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| atresia | (noun) an abnormal condition in which a normal opening or tube in the body (as the urethra) is closed or absent | - |
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| atrium | (noun) the central area in a building; open to the sky | - |
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| (noun) any chamber that is connected to other chambers or passageways (especially one of the two upper chambers of the heart) | - |
| atrociousness | (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrocity, barbarity, barbarousness, heinousness |
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| atrocity | (noun) an act of atrocious cruelty | Synonyms: inhumanity |
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| (noun) the quality of being shockingly cruel and inhumane | Synonyms: atrociousness, barbarity, barbarousness, heinousness |
| atrophedema | (noun) recurrent large circumscribed areas of subcutaneous edema; onset is sudden and it disappears within 24 hours; seen mainly in young women, often as an allergic reaction to food or drugs | Synonyms: angioedema, giant hives, periodic edema, Quincke's edema |
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| atrophy | (noun) any weakening or degeneration (especially through lack of use) | Synonyms: withering |
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| (noun) a decrease in size of an organ caused by disease or disuse | Synonyms: wasting, wasting away |
| atropine | (noun) a poisonous crystalline alkaloid extracted from the nightshade family; used as an antispasmodic and to dilate the eye pupil; also administered in large amounts as an antidote for organophosphate nerve agents or organophosphate insecticides | - |
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| attache | (noun) a shallow and rectangular briefcase | Synonyms: attache case |
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| (noun) a specialist assigned to the staff of a diplomatic mission | - |
| attachment | (noun) the act of fastening things together | Synonyms: fastening |
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| (noun) the act of attaching or affixing something | Synonyms: affixation |
| (noun) faithful support for a cause or political party or religion | Synonyms: adherence, adhesion |
| (noun) a supplementary part or accessory | - |
| (noun) a connection that fastens things together | Synonyms: bond |
| (noun) a writ authorizing the seizure of property that may be needed for the payment of a judgment in a judicial proceeding | - |
| (noun) a feeling of affection for a person or an institution | Synonyms: fond regard |
| attack | (noun) (military) an offensive against an enemy (using weapons) | Synonyms: onrush, onset, onslaught |
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| (noun) a decisive manner of beginning a musical tone or phrase | Synonyms: tone-beginning |
| (noun) the act of attacking | Synonyms: attempt |
| (noun) ideas or actions intended to deal with a problem or situation | Synonyms: approach, plan of attack |
| (noun) an offensive move in a sport or game | - |
| (noun) strong criticism | - |
| (noun) intense adverse criticism | Synonyms: blast, fire, flack, flak |
| (noun) the onset of a corrosive or destructive process (as by a chemical agent) | - |
| (noun) a sudden occurrence of an uncontrollable condition | - |
| attacker | (noun) someone who attacks | Synonyms: aggressor, assailant, assaulter |
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| attainability | (noun) the state of being achievable | Synonyms: achievability, attainableness |
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| attainableness | (noun) the state of being achievable | Synonyms: achievability, attainability |
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| attainder | (noun) cancellation of civil rights | Synonyms: civil death |
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| attainment | (noun) the act of achieving an aim | - |
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| (noun) arrival at a new stage | - |
| (noun) an ability that has been acquired by training | Synonyms: accomplishment, acquirement, acquisition, skill |
| attar | (noun) essential oil or perfume obtained from flowers | Synonyms: atar, athar, ottar |
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| attempt | (noun) earnest and conscientious activity intended to do or accomplish something | Synonyms: effort, endeavor, endeavour, try |
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| (noun) the act of attacking | Synonyms: attack |
| attempter | (noun) one who tries | Synonyms: essayer, trier |
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| attendance | (noun) the act of being present (at a meeting or event etc.) | Synonyms: attending |
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| (noun) the number of people that are present | - |
| (noun) the frequency with which a person is present | - |
| attendant | (noun) an event or situation that happens at the same time as or in connection with another | Synonyms: accompaniment, co-occurrence, concomitant |
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| (noun) someone who waits on or tends to or attends to the needs of another | Synonyms: attender, tender |
| (noun) a person who is present and participates in a meeting | Synonyms: attendee, attender, meeter |
| attendee | (noun) a person who is present and participates in a meeting | Synonyms: attendant, attender, meeter |
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| attender | (noun) someone who waits on or tends to or attends to the needs of another | Synonyms: attendant, tender |
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| (noun) a person who is present and participates in a meeting | Synonyms: attendant, attendee, meeter |
| (noun) someone who listens attentively | Synonyms: auditor, hearer, listener |
| attending | (noun) the act of being present (at a meeting or event etc.) | Synonyms: attendance |
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| (noun) the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others | Synonyms: attention |
| attention | (noun) the work of providing treatment for or attending to someone or something | Synonyms: aid, care, tending |
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| (noun) a courteous act indicating affection | - |
| (noun) a motionless erect stance with arms at the sides and feet together; assumed by military personnel during drill or review | - |
| (noun) the process whereby a person concentrates on some features of the environment to the (relative) exclusion of others | Synonyms: attending |
| (noun) the faculty or power of mental concentration | - |
| (noun) a general interest that leads people to want to know more | - |
| attentiveness | (noun) the trait of being considerate and thoughtful of others | - |
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| (noun) the trait of being observant and paying attention | - |
| (noun) paying particular notice (as to children or helpless people) | Synonyms: heed, paying attention, regard |
| attenuation | (noun) the property of something that has been weakened or reduced in thickness or density | - |
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| (noun) weakening in force or intensity | Synonyms: fading |
| attenuator | (noun) an electrical device for attenuating the strength of an electrical signal | - |
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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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| attic | (noun) floor consisting of open space at the top of a house just below roof; often used for storage | Synonyms: garret, loft |
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| (noun) (architecture) a low wall at the top of the entablature; hides the roof | - |
| (noun) informal terms for a human head | Synonyms: bean, bonce, dome, noggin, noodle |
| attire | (noun) clothing of a distinctive style or for a particular occasion | Synonyms: dress, garb |
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| attitude | (noun) a theatrical pose created for effect | - |
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| (noun) the arrangement of the body and its limbs | Synonyms: position, posture |
| (noun) a complex mental state involving beliefs and feelings and values and dispositions to act in certain ways | Synonyms: mental attitude |
| (noun) position of aircraft or spacecraft relative to a frame of reference (the horizon or direction of motion) | - |
| attorney | (noun) a professional person authorized to practice law; conducts lawsuits or gives legal advice | Synonyms: lawyer |
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| attorneyship | (noun) the position of attorney | - |
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| attosecond | (noun) one quintillionth (10^-18) of a second; one thousandth of a femtosecond | - |
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| attracter | (noun) a characteristic that provides pleasure and attracts | Synonyms: attraction, attractive feature, attractor, magnet |
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| (noun) (physics) a point in the ideal multidimensional phase space that is used to describe a system toward which the system tends to evolve regardless of the starting conditions of the system | Synonyms: attractor |
| (noun) an entertainer who attracts large audiences | Synonyms: attraction, attractor, draw, drawing card |
| attraction | (noun) the quality of arousing interest; being attractive or something that attracts | Synonyms: attractiveness |
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| (noun) a characteristic that provides pleasure and attracts | Synonyms: attracter, attractive feature, attractor, magnet |
| (noun) an entertainment that is offered to the public | - |
| (noun) an entertainer who attracts large audiences | Synonyms: attracter, attractor, draw, drawing card |
| (noun) the force by which one object attracts another | Synonyms: attractive force |
| attractiveness | (noun) sexual allure | - |
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| (noun) the quality of arousing interest; being attractive or something that attracts | Synonyms: attraction |
| attractor | (noun) a characteristic that provides pleasure and attracts | Synonyms: attracter, attraction, attractive feature, magnet |
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| (noun) (physics) a point in the ideal multidimensional phase space that is used to describe a system toward which the system tends to evolve regardless of the starting conditions of the system | Synonyms: attracter |
| (noun) an entertainer who attracts large audiences | Synonyms: attracter, attraction, draw, drawing card |
| attribute | (noun) an abstraction belonging to or characteristic of an entity | - |
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| (noun) a construct whereby objects or individuals can be distinguished | Synonyms: dimension, property |
| attribution | (noun) assigning to a cause or source | Synonyms: ascription |
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| (noun) assigning some quality or character to a person or thing | Synonyms: ascription |
| attrition | (noun) the act of rubbing together; wearing something down by friction | - |
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| (noun) a wearing down to weaken or destroy | - |
| (noun) sorrow for sin arising from fear of damnation | Synonyms: contriteness, contrition |
| (noun) the wearing down of rock particles by friction due to water or wind or ice | Synonyms: abrasion, detrition, grinding |
| (noun) erosion by friction | Synonyms: abrasion, corrasion, detrition |
| atypicality | (noun) any state that is not typical | Synonyms: untypicality |
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