| absorptance | (noun) a measure of the rate of decrease in the intensity of electromagnetic radiation (as light) as it passes through a given substance; the fraction of incident radiant energy absorbed per unit mass or thickness of an absorber | Synonyms: absorption coefficient, coefficient of absorption |
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| absorption | (noun) the mental state of being preoccupied by something | Synonyms: engrossment, preoccupancy, preoccupation |
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| (noun) complete attention; intense mental effort | Synonyms: concentration, engrossment, immersion |
| (noun) (chemistry) a process in which one substance permeates another; a fluid permeates or is dissolved by a liquid or solid | Synonyms: soaking up |
| (noun) the process of absorbing nutrients into the body after digestion | Synonyms: assimilation |
| (noun) (physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium | - |
| (noun) the social process of absorbing one cultural group into harmony with another | Synonyms: assimilation |
| absorptive | (adjective) having power or capacity or tendency to absorb or soak up something (liquids or energy etc.) | Synonyms: absorbent |
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| absorptivity | (noun) (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body | Synonyms: absorption factor |
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| abstainer | (noun) a person who refrains from drinking intoxicating beverages | Synonyms: abstinent, nondrinker |
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| (noun) someone who practices self denial as a spiritual discipline | Synonyms: ascetic |
| abstract | (adjective) existing only in the mind; separated from embodiment | - |
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| (adjective) not representing or imitating external reality or the objects of nature | Synonyms: abstractionist, nonfigurative, nonobjective |
| (adjective) dealing with a subject in the abstract without practical purpose or intention | - |
| (noun) a concept or idea not associated with any specific instance | Synonyms: abstraction |
| (noun) a sketchy summary of the main points of an argument or theory | Synonyms: outline, precis, synopsis |
| (verb) consider a concept without thinking of a specific example; consider abstractly or theoretically | - |
| (verb) consider apart from a particular case or instance | - |
| (verb) give an abstract (of) | - |
| (verb) make off with belongings of others | Synonyms: cabbage, filch, hook, lift, nobble, pilfer, pinch, purloin, snarf, sneak, swipe |
| abstracted | (adjective) lost in thought; showing preoccupation | Synonyms: absent, absentminded, scatty |
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| abstractedly | (adverb) in an absentminded or preoccupied manner | Synonyms: absently, absentmindedly, inattentively |
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| abstractedness | (noun) preoccupation with something to the exclusion of all else | Synonyms: abstraction |
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| abstracter | (noun) one who makes abstracts or summarizes information | Synonyms: abstractor |
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| abstraction | (noun) a general concept formed by extracting common features from specific examples | Synonyms: abstract entity |
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| (noun) the act of withdrawing or removing something | - |
| (noun) an abstract painting | - |
| (noun) a concept or idea not associated with any specific instance | Synonyms: abstract |
| (noun) preoccupation with something to the exclusion of all else | Synonyms: abstractedness |
| (noun) the process of formulating general concepts by abstracting common properties of instances | Synonyms: generalisation, generalization |
| abstractionism | (noun) an abstract genre of art; artistic content depends on internal form rather than pictorial representation | Synonyms: abstract art |
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| (noun) a representation having no reference to concrete objects or specific examples | Synonyms: unrealism |
| abstractionist | (adjective) not representing or imitating external reality or the objects of nature | Synonyms: abstract, nonfigurative, nonobjective |
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| (noun) a painter of abstract pictures | Synonyms: abstract artist |
| abstractive | (adjective) of an abstracting nature or having the power of abstracting | - |
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| abstractly | (adverb) in abstract terms | - |
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| abstractness | (noun) the quality of being considered apart from a specific instance or object | - |
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| abstractor | (noun) one who makes abstracts or summarizes information | Synonyms: abstracter |
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| abstruse | (adjective) difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge | Synonyms: deep, recondite |
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| abstrusely | (adverb) in a manner difficult to understand | - |
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| 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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| absurd | (adjective) so unreasonable as to invite derision | Synonyms: cockeyed, derisory, idiotic, laughable, ludicrous, nonsensical, preposterous, ridiculous |
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| (adjective) inconsistent with reason or logic or common sense | - |
| (noun) a situation in which life seems irrational and meaningless | Synonyms: the absurd |
| absurdity | (noun) a ludicrous folly | Synonyms: fatuity, fatuousness, silliness |
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| (noun) a message whose content is at variance with reason | Synonyms: absurdness, ridiculousness |
| absurdly | (adverb) in an absurd manner or to an absurd degree | - |
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| absurdness | (noun) a message whose content is at variance with reason | Synonyms: absurdity, ridiculousness |
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| abuser | (noun) someone who abuses | Synonyms: maltreater |
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| abutter | (noun) the owner of contiguous property | - |
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| acanthopterygian | (noun) a teleost fish with fins that are supported by sharp inflexible rays | Synonyms: spiny-finned fish |
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| acaracide | (noun) a chemical agent used to kill mites | Synonyms: acaricide |
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| acardia | (noun) congenital absence of the heart (as in the development of some monsters) | - |
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| acariasis | (noun) infestation with itch mites | Synonyms: acaridiasis, acariosis |
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| acaricide | (noun) a chemical agent used to kill mites | Synonyms: acaracide |
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| acarid | (noun) very small free-living arachnid that is parasitic on animals or plants; related to ticks | - |
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| acaridiasis | (noun) infestation with itch mites | Synonyms: acariasis, acariosis |
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| acarine | (noun) mite or tick | - |
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| acariosis | (noun) infestation with itch mites | Synonyms: acariasis, acaridiasis |
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| acarophobia | (noun) a morbid fear of small insects and mites and worms | - |
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| acarpellous | (adjective) having no carpels | Synonyms: acarpelous |
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| acarpelous | (adjective) having no carpels | Synonyms: acarpellous |
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| acarpous | (adjective) producing no fruit | - |
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| acarus | (noun) any of several mites of the order Acarina | Synonyms: genus Acarus |
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| acaryote | (noun) a cell without a nucleus (as an erythrocyte) | Synonyms: akaryocyte, akaryote |
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| accelerando | (adjective) (music) gradually increasing in tempo | - |
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| (noun) a gradually increasing tempo of music | - |
| (adverb) with increasing speed | - |
| accelerate | (verb) move faster | Synonyms: quicken, speed, speed up |
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| (verb) cause to move faster | Synonyms: speed, speed up |
| accelerated | (adjective) speeded up, as of an academic course | - |
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| acceleration | (noun) the act of accelerating; increasing the speed | Synonyms: quickening, speedup |
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| (noun) an increase in rate of change | - |
| (noun) (physics) a rate of increase of velocity | - |
| accelerative | (adjective) tending to increase velocity | Synonyms: acceleratory |
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| accelerator | (noun) a valve that regulates the supply of fuel to the engine | Synonyms: throttle, throttle valve |
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| (noun) a scientific instrument that increases the kinetic energy of charged particles | Synonyms: atom smasher, particle accelerator |
| (noun) a pedal that controls the throttle valve | Synonyms: accelerator pedal, gas, gas pedal, gun, throttle |
| (noun) (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected | Synonyms: catalyst |
| acceleratory | (adjective) tending to increase velocity | Synonyms: accelerative |
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| accelerometer | (noun) an instrument for measuring the acceleration of aircraft or rockets | - |
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| accentor | (noun) small sparrow-like songbird of mountainous regions of Eurasia | - |
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| acceptor | (noun) the person (or institution) who accepts a check or draft and becomes responsible for paying the party named in the draft when it matures | - |
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| (noun) (chemistry) in the formation of a coordinate bond it is the compound to which electrons are donated | - |
| accessary | (adjective) aiding and abetting in a crime | Synonyms: accessory |
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| (noun) someone who helps another person commit a crime | Synonyms: accessory |
| accessorial | (adjective) nonessential but helpful | - |
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| accessory | (adjective) furnishing added support | Synonyms: adjunct, adjuvant, ancillary, appurtenant, auxiliary |
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| (adjective) aiding and abetting in a crime | Synonyms: accessary |
| (noun) a supplementary component that improves capability | Synonyms: add-on, appurtenance, supplement |
| (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accouterment, accoutrement |
| (noun) someone who helps another person commit a crime | Synonyms: accessary |
| acciaccatura | (noun) an embellishing note usually written in smaller size | Synonyms: appoggiatura, grace note |
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| accipitrine | (adjective) of or relating to or belonging to the genus Accipiter (or to typical hawks) | - |
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| accommodator | (noun) someone who performs a service or does a favor | Synonyms: obliger |
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| accord | (noun) sympathetic compatibility | - |
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| (noun) concurrence of opinion | Synonyms: accordance, conformity |
| (noun) a written agreement between two states or sovereigns | Synonyms: pact, treaty |
| (noun) harmony of people's opinions or actions or characters | Synonyms: agreement |
| (verb) allow to have | Synonyms: allot, grant |
| (verb) go together | Synonyms: agree, concord, consort, fit in, harmonise, harmonize |
| accordance | (noun) the act of granting rights | Synonyms: accordance of rights |
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| (noun) concurrence of opinion | Synonyms: accord, conformity |
| accordant | (adjective) being in agreement or harmony; often followed by `with' | - |
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| (adjective) in keeping | Synonyms: agreeable, concordant, conformable, consonant |
| according | (adjective) (followed by `to') in agreement with or accordant with | - |
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| (adjective) (followed by `to') as reported or stated by | - |
| accordingly | (adverb) (sentence connectors) because of the reason given | Synonyms: consequently |
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| (adverb) in accordance with | - |
| accordion | (noun) a portable box-shaped free-reed instrument; the reeds are made to vibrate by air from the bellows controlled by the player | Synonyms: squeeze box |
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| accordionist | (noun) a musician who plays the accordion | - |
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| accoucheur | (noun) a physician specializing in obstetrics | Synonyms: obstetrician |
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| accouter | (verb) provide with military equipment | Synonyms: accoutre |
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| accoutered | (adjective) provided with necessary articles of equipment for a specialized purpose (especially military) | Synonyms: accoutred |
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| accouterment | (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accessory, accoutrement |
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| accoutre | (verb) provide with military equipment | Synonyms: accouter |
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| accoutred | (adjective) provided with necessary articles of equipment for a specialized purpose (especially military) | Synonyms: accoutered |
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| accoutrement | (noun) clothing that is worn or carried, but not part of your main clothing | Synonyms: accessory, accouterment |
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| accredit | (verb) ascribe an achievement to | Synonyms: credit |
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| (verb) grant credentials to | Synonyms: recognise, recognize |
| (verb) provide or send (envoys or ambassadors) with official credentials | - |
| accreditation | (noun) the act of granting credit or recognition (especially with respect to an educational institution that maintains suitable standards) | - |
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| accredited | (adjective) given official approval to act | Synonyms: commissioned, licenced, licensed |
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| accrete | (verb) grow together (of plants and organs) | Synonyms: grow together |
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| (verb) grow or become attached by accretion | - |
| accretion | (noun) (law) an increase in a beneficiary's share in an estate (as when a co-beneficiary dies or fails to meet some condition or rejects the inheritance) | - |
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| (noun) an increase by natural growth or addition | Synonyms: accumulation |
| (noun) (geology) an increase in land resulting from alluvial deposits or waterborne sediment | - |
| (noun) (biology) growth by addition as by the adhesion of parts or particles | - |
| (noun) (astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases | - |
| (noun) something contributing to growth or increase | - |
| accretionary | (adjective) marked or produced by accretion | - |
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| accretive | (adjective) growing by accretion | - |
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| accroides | (noun) an alcohol-soluble resin from Australian trees; used in varnishes and in manufacturing paper | Synonyms: acaroid resin, accaroid resin, accroides gum, accroides resin, gum accroides |
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| accrual | (noun) the act of accumulating | Synonyms: accruement, accumulation |
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| accrue | (verb) grow by addition | - |
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| (verb) come into the possession of | Synonyms: fall |
| accrued | (adjective) periodically accumulated over time | Synonyms: accumulated |
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| accruement | (noun) the act of accumulating | Synonyms: accrual, accumulation |
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| acculturate | (verb) assimilate culturally | - |
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| acculturation | (noun) the adoption of the behavior patterns of the surrounding culture | Synonyms: enculturation, socialisation, socialization |
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| (noun) all the knowledge and values shared by a society | Synonyms: culture |
| (noun) the process of assimilating new ideas into an existing cognitive structure | Synonyms: assimilation |
| acculturational | (adjective) of or relating to acculturation | Synonyms: acculturative |
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| acculturative | (adjective) of or relating to acculturation | Synonyms: acculturational |
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| accumulator | (noun) a voltaic battery that stores electric charge | Synonyms: storage battery |
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| (noun) (computer science) a register that has a built-in adder that adds an input number to the contents of the register | Synonyms: accumulator register |
| (noun) a person who is employed to collect payments (as for rent or taxes) | Synonyms: collector, gatherer |
| accuracy | (noun) the quality of being near to the true value | Synonyms: truth |
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| (noun) (mathematics) the number of significant figures given in a number | - |
| accurate | (adjective) conforming exactly or almost exactly to fact or to a standard or performing with total accuracy | - |
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| (adjective) (of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth; strictly correct | Synonyms: exact, precise |
| accurately | (adverb) with few mistakes | - |
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| (adverb) strictly correctly | - |
| accurse | (verb) curse or declare to be evil or anathema or threaten with divine punishment | Synonyms: anathematise, anathematize, anathemise, anathemize, comminate, execrate |
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| accursed | (adjective) under a curse | Synonyms: accurst, maledict |
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| accurst | (adjective) under a curse | Synonyms: accursed, maledict |
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| accusatorial | (adjective) specifically indicating a form of prosecution in which one is publicly accused of and tried for a crime and in which the judge is not also the prosecutor | - |
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| accusatory | (adjective) containing or expressing accusation | Synonyms: accusative, accusing, accusive |
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| accuser | (noun) someone who imputes guilt or blame | - |
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| acellular | (adjective) not made up of or divided into cells | Synonyms: noncellular |
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| acentric | (adjective) lacking a centromere | - |
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| (adjective) not centered or having no center | - |