| deciban | (noun) a unit of information, one tenth of a ban. | - |
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| decibel | (noun) a logarithmic unit of sound intensity; 10 times the logarithm of the ratio of the sound intensity to some reference intensity | Synonyms: dB |
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| deciding | (noun) the cognitive process of reaching a decision | Synonyms: decision making |
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| decidua | (noun) the epithelial tissue of the endometrium | - |
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| decigram | (noun) 1/10 gram | Synonyms: dg |
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| decile | (noun) (statistics) any of nine points that divided a distribution of ranked scores into equal intervals where each interval contains one-tenth of the scores | - |
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| deciliter | (noun) a metric unit of volume equal to one tenth of a liter | Synonyms: decilitre, dl |
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| decilitre | (noun) a metric unit of volume equal to one tenth of a liter | Synonyms: deciliter, dl |
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| decimal | (noun) a proper fraction whose denominator is a power of 10 | Synonyms: decimal fraction |
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| (noun) a number in the decimal system | - |
| decimalisation | (noun) the act of changing to a decimal system | Synonyms: decimalization |
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| decimalization | (noun) the act of changing to a decimal system | Synonyms: decimalisation |
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| decimation | (noun) destroying or killing a large part of the population | - |
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| decimeter | (noun) a metric unit of length equal to one tenth of a meter | Synonyms: decimetre, dm |
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| decimetre | (noun) a metric unit of length equal to one tenth of a meter | Synonyms: decimeter, dm |
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| decipherer | (noun) a reader capable of reading and interpreting illegible or obscure text | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decoder |
| decipherment | (noun) the activity of making clear or converting from code into plain text | Synonyms: decoding, decryption |
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| decision | (noun) the act of making up your mind about something | Synonyms: conclusion, determination |
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| (noun) the trait of resoluteness as evidenced by firmness of character or purpose | Synonyms: decisiveness |
| (noun) a position or opinion or judgment reached after consideration | Synonyms: conclusion, determination |
| (noun) the outcome of a game or contest | - |
| (noun) (boxing) a victory won on points when no knockout has occurred | - |
| decisiveness | (noun) the trait of resoluteness as evidenced by firmness of character or purpose | Synonyms: decision |
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| (noun) the quality of being final or definitely settled | Synonyms: conclusiveness, finality |
| deck | (noun) any of various platforms built into a vessel | - |
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| (noun) street name for a packet of illegal drugs | - |
| (noun) a porch that resembles the deck on a ship | - |
| (noun) a pack of 52 playing cards | Synonyms: deck of cards, pack of cards |
| decker | (noun) (often used in combinations) something constructed with multiple levels | - |
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| deckhand | (noun) a member of a ship's crew who performs manual labor | Synonyms: roustabout |
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| deckle | (noun) (paper making) a frame used to form paper pulp into sheets | - |
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| (noun) rough edge left by a deckle on handmade paper or produced artificially on machine-made paper | Synonyms: deckle edge |
| declamation | (noun) vehement oratory | - |
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| (noun) recitation of a speech from memory with studied gestures and intonation as an exercise in elocution or rhetoric | - |
| declaration | (noun) a statement that is emphatic and explicit (spoken or written) | - |
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| (noun) a formal expression by a meeting; agreed to by a vote | Synonyms: resolution, resolve |
| (noun) (law) unsworn statement that can be admitted in evidence in a legal transaction | - |
| (noun) a formal public statement | Synonyms: announcement, annunciation, proclamation |
| (noun) (contract bridge) the highest bid becomes the contract setting the number of tricks that the bidder must make | Synonyms: contract |
| (noun) a statement of taxable goods or of dutiable properties | - |
| declarative | (noun) a mood (grammatically unmarked) that represents the act or state as an objective fact | Synonyms: common mood, declarative mood, fact mood, indicative, indicative mood |
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| declarer | (noun) the bridge player in contract bridge who wins the bidding and can declare which suit is to be trumps | Synonyms: contractor |
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| (noun) someone who claims to speak the truth | Synonyms: affirmer, asserter, asseverator, avower |
| declassification | (noun) reduction or removal by the government of restrictions on a classified document or weapon | - |
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| declension | (noun) a class of nouns or pronouns or adjectives in Indo-European languages having the same (or very similar) inflectional forms | - |
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| (noun) a downward slope or bend | Synonyms: declination, decline, declivity, descent, downslope, fall |
| (noun) process of changing to an inferior state | Synonyms: decline in quality, deterioration, worsening |
| (noun) the inflection of nouns and pronouns and adjectives in Indo-European languages | - |
| declination | (noun) a polite refusal of an invitation | Synonyms: regrets |
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| (noun) (astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascension to specify positions on the celestial sphere | Synonyms: celestial latitude, dec |
| (noun) a downward slope or bend | Synonyms: declension, decline, declivity, descent, downslope, fall |
| (noun) a condition inferior to an earlier condition; a gradual falling off from a better state; decline | Synonyms: decline |
| decline | (noun) a downward slope or bend | Synonyms: declension, declination, declivity, descent, downslope, fall |
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| (noun) a gradual decrease; as of stored charge or current | Synonyms: decay |
| (noun) change toward something smaller or lower | Synonyms: diminution |
| (noun) a condition inferior to an earlier condition; a gradual falling off from a better state; decline | Synonyms: declination |
| declinometer | (noun) an instrument for measuring magnetic declination | Synonyms: transit declinometer |
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| declivity | (noun) a downward slope or bend | Synonyms: declension, declination, decline, descent, downslope, fall |
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| deco | (noun) a style of design that was popular in the 1920s and 1930s; marked by stylized forms and geometric designs adapted to mass production | Synonyms: art deco |
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| decoagulant | (noun) medicine that prevents or retards the clotting of blood | Synonyms: anticoagulant, anticoagulant medication |
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| decoction | (noun) (pharmacology) the extraction of water-soluble drug substances by boiling | - |
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| decoder | (noun) a machine that converts a coded text into ordinary language | - |
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| (noun) the kind of intellectual who converts messages from a code to plain text | Synonyms: decipherer |
| decoding | (noun) the activity of making clear or converting from code into plain text | Synonyms: decipherment, decryption |
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| decolletage | (noun) a low-cut neckline on a woman's dress | - |
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| decolonisation | (noun) the action of changing from colonial to independent status | Synonyms: decolonization |
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| decolonization | (noun) the action of changing from colonial to independent status | Synonyms: decolonisation |
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| decomposition | (noun) the analysis of a vector field | Synonyms: vector decomposition |
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| (noun) the organic phenomenon of rotting | Synonyms: decay |
| (noun) (biology) the process of decay caused by bacterial or fungal action | Synonyms: breakdown, putrefaction, rot, rotting |
| (noun) (chemistry) separation of a substance into two or more substances that may differ from each other and from the original substance | Synonyms: breakdown, chemical decomposition reaction, decomposition reaction |
| (noun) in a decomposed state | Synonyms: disintegration |
| decompressing | (noun) relieving pressure (especially bringing a compressed person gradually back to atmospheric pressure) | Synonyms: decompression |
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| decompression | (noun) relieving pressure (especially bringing a compressed person gradually back to atmospheric pressure) | Synonyms: decompressing |
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| (noun) restoring compressed information to its normal form for use or display | - |
| decongestant | (noun) a drug that decreases pulmonary congestion | - |
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| deconstruction | (noun) a philosophical theory of criticism (usually of literature or film) that seeks to expose deep-seated contradictions in a work by delving below its surface meaning | Synonyms: deconstructionism |
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| deconstructionism | (noun) a philosophical theory of criticism (usually of literature or film) that seeks to expose deep-seated contradictions in a work by delving below its surface meaning | Synonyms: deconstruction |
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| deconstructivism | (noun) a school of architecture based on the philosophical theory of deconstruction | - |
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| decontamination | (noun) the removal of contaminants | - |
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| decor | (noun) decoration consisting of the layout and furnishings of a livable interior | Synonyms: interior decoration |
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| decoration | (noun) the act of decorating something (in the hope of making it more attractive) | - |
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| (noun) something used to beautify | Synonyms: ornament, ornamentation |
| (noun) an award for winning a championship or commemorating some other event | Synonyms: laurel wreath, medal, medallion, palm, ribbon |
| decorativeness | (noun) an appearance that serves to decorate and make something more attractive | - |
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| decorator | (noun) someone who decorates | Synonyms: ornamentalist |
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| (noun) a person who specializes in interior decoration | Synonyms: house decorator, interior decorator, room decorator |
| decorousness | (noun) propriety in manners and conduct | Synonyms: decorum |
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| decortication | (noun) removal of the outer covering of an organ or part | - |
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| decorum | (noun) propriety in manners and conduct | Synonyms: decorousness |
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| decoupage | (noun) the art of decorating a surface with shapes or pictures and then coating it with varnish or lacquer | - |
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| (noun) art produced by decorating a surface with cutouts and then coating it with several layers of varnish or lacquer | - |
| decoy | (noun) something used to lure fish or other animals into danger so they can be trapped or killed | Synonyms: bait, lure |
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| (noun) a beguiler who leads someone into danger (usually as part of a plot) | Synonyms: steerer |
| decrease | (noun) the act of decreasing or reducing something | Synonyms: diminution, reduction, step-down |
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| (noun) the amount by which something decreases | Synonyms: decrement |
| (noun) a change downward | Synonyms: drop-off, lessening |
| (noun) a process of becoming smaller or shorter | Synonyms: decrement |
| decree | (noun) a legally binding command or decision entered on the court record (as if issued by a court or judge) | Synonyms: edict, fiat, order, rescript |
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| decrement | (noun) the amount by which something decreases | Synonyms: decrease |
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| (noun) a process of becoming smaller or shorter | Synonyms: decrease |
| decrementation | (noun) the operation of subtracting one from the operand. | - |
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| decrepitation | (noun) the crackling or breaking up of certain crystals when they are heated | - |
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| decrepitude | (noun) a state of deterioration due to old age or long use | Synonyms: dilapidation |
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| (noun) The quality or state of being wasted and weakened by or as if by the infirmities of old age. | - |
| decrescendo | (noun) (music) a gradual decrease in loudness | Synonyms: diminuendo |
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| decriminalisation | (noun) legislation that makes something legal that was formerly illegal | Synonyms: decriminalization |
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| decriminalization | (noun) legislation that makes something legal that was formerly illegal | Synonyms: decriminalisation |
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| decryption | (noun) the activity of making clear or converting from code into plain text | Synonyms: decipherment, decoding |
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| decubitus | (noun) a reclining position (as in a bed) | - |
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| decumary | (noun) woody climber of southeastern United States having white flowers in compound terminal clusters | Synonyms: Decumaria barbara, Decumaria barbata |
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| decussation | (noun) an intersection or crossing of two tracts in the form of the letter X | Synonyms: chiasm, chiasma |
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| dedication | (noun) the act of binding yourself (intellectually or emotionally) to a course of action | Synonyms: allegiance, commitment, loyalty |
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| (noun) complete and wholehearted fidelity | - |
| (noun) a short message (as in a book or musical work or on a photograph) dedicating it to someone or something | Synonyms: inscription |
| (noun) a message that makes a pledge | Synonyms: commitment |
| (noun) a ceremony in which something (as a building) is dedicated to some goal or purpose | - |
| dedifferentiation | (noun) the loss of specialization in form or function | - |
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| deductible | (noun) a clause in an insurance policy that relieves the insurer of responsibility to pay the initial loss up to a stated amount | - |
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| (noun) (taxes) an amount that can be deducted (especially for the purposes of calculating income tax) | - |
| deduction | (noun) the act of subtracting (removing a part from the whole) | Synonyms: subtraction |
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| (noun) the act of reducing the selling price of merchandise | Synonyms: discount, price reduction |
| (noun) reasoning from the general to the particular (or from cause to effect) | Synonyms: deductive reasoning, synthesis |
| (noun) something that is inferred (deduced or entailed or implied) | Synonyms: entailment, implication |
| (noun) an amount or percentage deducted | Synonyms: discount |
| (noun) a reduction in the gross amount on which a tax is calculated; reduces taxes by the percentage fixed for the taxpayer's income bracket | Synonyms: tax deduction, tax write-off |
| deed | (noun) something that people do or cause to happen | Synonyms: act, human action, human activity |
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| (noun) a legal document signed and sealed and delivered to effect a transfer of property and to show the legal right to possess it | Synonyms: deed of conveyance, title |
| deedbox | (noun) a strongly made box for holding money or valuables; can be locked | Synonyms: strongbox |
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| deeds | (noun) performance of moral or religious acts | Synonyms: works |
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| deep | (noun) a long steep-sided depression in the ocean floor | Synonyms: oceanic abyss, trench |
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| (noun) literary term for an ocean | - |
| (noun) the central and most intense or profound part | - |
| deepening | (noun) a process of becoming deeper and more profound | - |
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| deepness | (noun) the quality of being physically deep | Synonyms: profoundness, profundity |
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| (noun) the extent downward or backward or inward | Synonyms: depth |
| (noun) a low pitch that is loud and voluminous | - |
| (noun) the intellectual ability to penetrate deeply into ideas | Synonyms: astuteness, depth, profoundness, profundity |
| deer | (noun) distinguished from Bovidae by the male's having solid deciduous antlers | Synonyms: cervid |
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| deerberry | (noun) small branching blueberry common in marshy areas of the eastern United States having greenish or yellowish unpalatable berries reputedly eaten by deer | Synonyms: squaw huckleberry, Vaccinium stamineum |
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| deerhound | (noun) very large and tall rough-coated dog bred for hunting deer; known as the royal dog of Scotland | Synonyms: Scottish deerhound |
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| deerskin | (noun) leather from the hide of a deer | - |
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| deerstalker | (noun) a tight-fitting hat with visors front and back; formerly worn by hunters | - |
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| deerstalking | (noun) stalking deer | - |
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| defacement | (noun) the act of damaging the appearance or surface of something | Synonyms: disfiguration, disfigurement, mutilation |
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| defalcation | (noun) the fraudulent appropriation of funds or property entrusted to your care but actually owned by someone else | Synonyms: embezzlement, misapplication, misappropriation, peculation |
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| (noun) the sum of money that is misappropriated | - |
| defalcator | (noun) someone who violates a trust by taking (money) for his own use | Synonyms: embezzler, peculator |
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| defamation | (noun) an abusive attack on a person's character or good name | Synonyms: aspersion, calumny, denigration, slander |
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| (noun) a false accusation of an offense or a malicious misrepresentation of someone's words or actions | Synonyms: calumniation, calumny, hatchet job, obloquy, traducement |
| defamer | (noun) one who attacks the reputation of another by slander or libel | Synonyms: backbiter, libeler, maligner, slanderer, traducer, vilifier |
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| default | (noun) loss due to not showing up | - |
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| (noun) an option that is selected automatically unless an alternative is specified | Synonyms: default option |
| (noun) loss resulting from failure of a debt to be paid | Synonyms: nonpayment, nonremittal |
| (noun) act of failing to meet a financial obligation | Synonyms: nonpayment, nonremittal |
| defaulter | (noun) a contestant who forfeits a match | - |
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| (noun) someone who fails to meet a financial obligation | Synonyms: deadbeat |
| (noun) someone who fails to make a required appearance in court | - |
| defeat | (noun) an unsuccessful ending to a struggle or contest | Synonyms: licking |
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| (noun) the feeling that accompanies an experience of being thwarted in attaining your goals | Synonyms: frustration |
| defeated | (noun) people who are defeated | Synonyms: discomfited |
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| defeatism | (noun) acceptance of the inevitability of defeat | - |
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| defeatist | (noun) someone who is resigned to defeat without offering positive suggestions | Synonyms: negativist |
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| defecation | (noun) the elimination of fecal waste through the anus | Synonyms: laxation, shitting |
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| defecator | (noun) (obsolete) that which cleanses or purifies; especially, an apparatus for removing the feculencies of juices and syrups. | - |
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| (noun) a person who defecates | Synonyms: shitter, voider |
| defect | (noun) a mark or flaw that spoils the appearance of something (especially on a person's body) | Synonyms: blemish, mar |
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| (noun) a failing or deficiency | Synonyms: shortcoming |
| (noun) an imperfection in an object or machine | Synonyms: fault, flaw |
| (noun) an imperfection in a bodily system | - |