| argentine | (noun) any of various small silver-scaled salmon-like marine fishes | - |
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| argentinosaur | (noun) huge herbivorous dinosaur of Cretaceous found in Argentina | - |
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| argentite | (noun) a valuable silver ore consisting of silver sulfide (Ag2S) | - |
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| argument | (noun) a variable in a logical or mathematical expression whose value determines the dependent variable; if f(x)=y, x is the independent variable | - |
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| (noun) a course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning | Synonyms: argumentation, line, line of reasoning, logical argument |
| (noun) a discussion in which reasons are advanced for and against some proposition or proposal | Synonyms: argumentation, debate |
| (noun) a summary of the subject or plot of a literary work or play or movie | Synonyms: literary argument |
| (noun) a fact or assertion offered as evidence that something is true | Synonyms: statement |
| (noun) a contentious speech act; a dispute where there is strong disagreement | Synonyms: arguing, contention, contestation, controversy, disceptation, disputation, tilt |
| (noun) (computer science) a reference or value that is passed to a function, procedure, subroutine, command, or program | Synonyms: parameter |
| argumentation | (noun) a course of reasoning aimed at demonstrating a truth or falsehood; the methodical process of logical reasoning | Synonyms: argument, line, line of reasoning, logical argument |
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| (noun) a discussion in which reasons are advanced for and against some proposition or proposal | Synonyms: argument, debate |
| armament | (noun) the act of equipping with weapons in preparation for war | Synonyms: arming, equipping |
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| (noun) weaponry used by military or naval force | - |
| armamentarium | (noun) the collection of equipment and methods used in the practice of medicine | - |
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| arpent | (noun) a former French unit of area; equal approximately to an acre | - |
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| arraignment | (noun) a legal document calling someone to court to answer an indictment | - |
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| arrangement | (noun) the act of arranging and adapting a piece of music | Synonyms: arranging, transcription |
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| (noun) the spatial property of the way in which something is placed | Synonyms: placement |
| (noun) an organized structure for arranging or classifying | Synonyms: organisation, organization, system |
| (noun) the thing arranged or agreed to | Synonyms: agreement |
| (noun) a piece of music that has been adapted for performance by a particular set of voices or instruments | Synonyms: musical arrangement |
| (noun) an orderly grouping (of things or persons) considered as a unit; the result of arranging | - |
| arthrocentesis | (noun) removal of fluid from a joint by centesis | - |
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| ascendent | (noun) someone from whom you are descended (but usually more remote than a grandparent) | Synonyms: ancestor, antecedent, ascendant, root |
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| (noun) position or state of being dominant or in control | Synonyms: ascendant |
| ascent | (noun) the act of changing location in an upward direction | Synonyms: ascending, ascension, rise |
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| (noun) a movement upward; rise above the ground | Synonyms: ascension, rise, rising |
| (noun) an upward slope or grade (as in a road) | Synonyms: acclivity, climb, raise, rise, upgrade |
| assent | (noun) agreement with a statement or proposal to do something | Synonyms: acquiescence |
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| assenter | (noun) a person who assents | - |
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| assenting | (noun) agreeing with or consenting to (often unwillingly) | Synonyms: accession |
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| assessment | (noun) the act of judging or assessing a person or situation or event | Synonyms: judgement, judgment |
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| (noun) the market value set on assets | - |
| (noun) the classification of someone or something with respect to its worth | Synonyms: appraisal |
| (noun) an amount determined as payable | - |
| assignment | (noun) a duty that you are assigned to perform (especially in the armed forces) | Synonyms: duty assignment |
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| (noun) the act of putting a person into a non-elective position | Synonyms: appointment, designation, naming |
| (noun) the act of distributing something to designated places or persons | Synonyms: assigning |
| (noun) an undertaking that you have been assigned to do (as by an instructor) | - |
| (noun) the instrument by which a claim or right or interest or property is transferred from one person to another | - |
| (noun) (law) a transfer of property by deed of conveyance | Synonyms: grant |
| assortment | (noun) the act of distributing things into classes or categories of the same type | Synonyms: categorisation, categorization, classification, compartmentalisation, compartmentalization |
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| (noun) a collection containing a variety of sorts of things | Synonyms: miscellanea, miscellany, mixed bag, mixture, motley, potpourri, salmagundi, smorgasbord, variety |
| assuagement | (noun) the feeling that comes when something burdensome is removed or reduced | Synonyms: alleviation, relief |
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| astonishment | (noun) the feeling that accompanies something extremely surprising | Synonyms: amazement |
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| astringent | (noun) a drug that causes contraction of body tissues and canals | Synonyms: astringent drug, styptic |
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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 |
| 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 |
| 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 |
| 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 |
| augmentation | (noun) the act of augmenting | - |
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| (noun) the statement of a theme in notes of greater duration (usually twice the length of the original) | - |
| (noun) the amount by which something becomes greater | - |
| authentication | (noun) validating the authenticity of something or someone | Synonyms: certification |
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| (noun) a mark on an article of trade to indicate its origin and authenticity | Synonyms: assay-mark, hallmark |
| authenticator | (noun) one who determines authenticity (as of works of art) or who guarantees validity | Synonyms: appraiser |
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| authenticity | (noun) undisputed credibility | Synonyms: genuineness, legitimacy |
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| aventail | (noun) a medieval hood of mail suspended from a basinet to protect the head and neck | Synonyms: camail, ventail |
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| aventurine | (noun) a translucent quartz spangled with bits of mica or other minerals | Synonyms: sunstone |
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| averment | (noun) a declaration that is made emphatically (as if no supporting evidence were necessary) | Synonyms: assertion, asseveration |
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| avouchment | (noun) a statement asserting the existence or the truth of something | Synonyms: affirmation, avowal |
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| bafflement | (noun) confusion resulting from failure to understand | Synonyms: befuddlement, bemusement, bewilderment, mystification, obfuscation, puzzlement |
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| bailment | (noun) the delivery of personal property in trust by the bailor to the bailee | - |
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| ballottement | (noun) a palpatory technique for feeling a floating object in the body (especially for determining the position of a fetus by feeling the rebound of the fetus after a quick digital tap on the wall of the uterus) | - |
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| banishment | (noun) rejection by means of an act of banishing or proscribing someone | Synonyms: proscription |
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| (noun) the state of being banished or ostracized (excluded from society by general consent) | Synonyms: Coventry, ostracism |
| barycenter | (noun) (astronomy) the common center of mass around which two or more bodies revolve | - |
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| basement | (noun) the lowermost portion of a structure partly or wholly below ground level; often used for storage | Synonyms: cellar |
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| (noun) the ground floor facade or interior in Renaissance architecture | - |
| battlement | (noun) a rampart built around the top of a castle with regular gaps for firing arrows or guns | Synonyms: crenelation, crenellation |
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| bedevilment | (noun) the act of harassing someone | Synonyms: badgering, torment, worrying |
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| befoulment | (noun) the state of being polluted | Synonyms: defilement, pollution |
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| befuddlement | (noun) confusion resulting from failure to understand | Synonyms: bafflement, bemusement, bewilderment, mystification, obfuscation, puzzlement |
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| beguilement | (noun) an entertainment that provokes pleased interest and distracts you from worries and vexations | Synonyms: distraction |
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| (noun) magnetic personal charm | Synonyms: animal magnetism, bewitchery |
| belittlement | (noun) the act of making a person or a thing seem little or unimportant. | - |
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| belligerent | (noun) someone who fights (or is fighting) | Synonyms: battler, combatant, fighter, scrapper |
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| bemusement | (noun) confusion resulting from failure to understand | Synonyms: bafflement, befuddlement, bewilderment, mystification, obfuscation, puzzlement |
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| bent | (noun) a special way of doing something | Synonyms: hang, knack |
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| (noun) a relatively permanent inclination to react in a particular way | Synonyms: set |
| (noun) an area of grassland unbounded by fences or hedges | - |
| (noun) grass for pastures and lawns especially bowling and putting greens | Synonyms: bent-grass, bent grass |
| benthos | (noun) organisms (plants and animals) that live at or near the bottom of a sea, lake, river or stream | - |
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| (noun) a region including the bottom of the sea and the littoral zones | Synonyms: benthic division, benthonic zone |
| bentonite | (noun) an absorbent aluminum silicate clay formed from volcanic ash | - |
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| bentwood | (noun) wood that is steamed until it becomes pliable and then is shaped for use in making furniture | - |
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| bereavement | (noun) state of sorrow over the death or departure of a loved one | Synonyms: mourning |
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| bestowment | (noun) the act of conferring an honor or presenting a gift | Synonyms: bestowal, conferment, conferral |
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| (noun) a gift that is bestowed or conferred | Synonyms: bestowal |
| betterment | (noun) the act of relieving ills and changing for the better | Synonyms: amelioration, melioration |
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| (noun) a change for the better; progress in development | Synonyms: advance, improvement |
| (noun) an improvement that adds to the value of a property or facility | - |
| bewilderment | (noun) confusion resulting from failure to understand | Synonyms: bafflement, befuddlement, bemusement, mystification, obfuscation, puzzlement |
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| bewitchment | (noun) a magical spell | Synonyms: enchantment |
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| bicentenary | (noun) the 200th anniversary (or the celebration of it) | Synonyms: bicentennial |
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| bicentennial | (noun) the 200th anniversary (or the celebration of it) | Synonyms: bicentenary |
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| blandishment | (noun) the act of urging by means of teasing or flattery | Synonyms: wheedling |
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| (noun) flattery intended to persuade | Synonyms: cajolery, palaver |
| bombardment | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, battery, shelling |
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| (noun) an attack by dropping bombs | Synonyms: bombing |
| (noun) the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays) | - |
| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: barrage, onslaught, outpouring |
| brent | (noun) small dark geese that breed in the north and migrate southward | Synonyms: brant, brant goose, brent goose |
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| cantonment | (noun) temporary living quarters specially built by the army for soldiers | Synonyms: bivouac, camp, encampment |
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| carpenter | (noun) a woodworker who makes or repairs wooden objects | - |
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| carpenteria | (noun) California evergreen shrub having glossy opposite leaves and terminal clusters of a few fragrant white flowers | Synonyms: Carpenteria californica |
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| carpentry | (noun) the craft of a carpenter: making things out of wood | Synonyms: woodwork, woodworking |
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| casement | (noun) a window sash that is hinged (usually on one side) | - |
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| catchment | (noun) a structure in which water is collected (especially a natural drainage area) | - |
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| celiocentesis | (noun) removal of fluid from the abdomen by centesis | - |
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| cement | (noun) a specialized bony substance covering the root of a tooth | Synonyms: cementum |
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| (noun) a building material that is a powder made of a mixture of calcined limestone and clay; used with water and sand or gravel to make concrete and mortar | - |
| (noun) something that hardens to act as adhesive material | - |
| (noun) concrete pavement is sometimes referred to as cement | - |
| (noun) any of various materials used by dentists to fill cavities in teeth | - |
| cementite | (noun) a chemical compound that is a constituent of steel and cast iron; very hard and brittle | Synonyms: iron carbide |
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| cementum | (noun) a specialized bony substance covering the root of a tooth | Synonyms: cement |
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| cent | (noun) a coin worth one-hundredth of the value of the basic unit | Synonyms: centime, penny |
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| (noun) a fractional monetary unit of several countries | - |
| cental | (noun) a United States unit of weight equivalent to 100 pounds | Synonyms: centner, cwt, hundredweight, quintal, short hundredweight |
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| centare | (noun) a unit of measurement for area, defined as the area of a square with sides of exactly 1 metre; a centiare is 1/100th of an are | Synonyms: square meter, square metre |
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| centas | (noun) 100 centas equal 1 litas in Lithuania | - |
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| centaur | (noun) (classical mythology) a mythical being that is half man and half horse | - |
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| centaury | (noun) any plant of the genus Centaurea | - |
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| (noun) any of various plants of the genus Centaurium | - |
| centavo | (noun) a fractional monetary unit of several countries: El Salvador and Sao Tome and Principe and Brazil and Argentina and Bolivia and Colombia and Cuba and the Dominican Republic and Ecuador and El Salvador and Guatemala and Honduras and Mexico and Nicaragua and Peru and the Philippines and Portugal | - |
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| centenarian | (noun) someone who is at least 100 years old | - |
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| centenary | (noun) the 100th anniversary (or the celebration of it) | Synonyms: centennial |
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| centennial | (noun) the 100th anniversary (or the celebration of it) | Synonyms: centenary |
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| center | (noun) a position on a basketball team of the player who participates in the jump that starts the game | Synonyms: centre |
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| (noun) (American football) the position of the player on the line of scrimmage who puts the ball in play | Synonyms: centre |
| (noun) the position on a hockey team of the player who participates in the face off at the beginning of the game | Synonyms: centre |
| (noun) a building dedicated to a particular activity | Synonyms: centre |
| (noun) mercantile establishment consisting of a carefully landscaped complex of shops representing leading merchandisers; usually includes restaurants and a convenient parking area; a modern version of the traditional marketplace | Synonyms: centre, mall, plaza, shopping center, shopping centre, shopping mall |
| (noun) the piece of ground in the outfield directly ahead of the catcher | Synonyms: center field, centerfield, centre |
| (noun) a cluster of nerve cells governing a specific bodily process | Synonyms: centre, nerve center, nerve centre |
| (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: centre, core, essence, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum |
| (noun) the object upon which interest and attention focuses | Synonyms: center of attention, centre, centre of attention |
| (noun) the sweet central portion of a piece of candy that is enclosed in chocolate or some other covering | Synonyms: centre |
| (noun) politically moderate persons; centrists | Synonyms: centre |
| (noun) the middle of a military or naval formation | Synonyms: centre |
| (noun) a point equidistant from the ends of a line or the extremities of a figure | Synonyms: centre, midpoint |
| (noun) an area that is approximately central within some larger region | Synonyms: centre, eye, heart, middle |
| (noun) a place where some particular activity is concentrated | Synonyms: centre |
| (noun) (football) the person who plays center on the line of scrimmage and snaps the ball to the quarterback | Synonyms: centre, snapper |
| (noun) (basketball) the person who plays center on a basketball team | Synonyms: centre |
| (noun) (ice hockey) the person who plays center on a hockey team | Synonyms: centre |
| centerboard | (noun) a retractable fin keel used on sailboats to prevent drifting to leeward | Synonyms: centreboard, drop keel, sliding keel |
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| centerfield | (noun) the fielding position of the player on a baseball team who is expected to field balls in the central third of the outfield | Synonyms: center field |
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| (noun) the piece of ground in the outfield directly ahead of the catcher | Synonyms: center, center field, centre |
| centerfielder | (noun) the person who plays center field | Synonyms: center fielder |
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| centerfold | (noun) a magazine center spread; especially a foldout of a large photograph or map or other feature | Synonyms: centrefold |
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| centering | (noun) (American football) putting the ball in play by passing it (between the legs) to a back | Synonyms: centring, snap |
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| (noun) the concentration of attention or energy on something | Synonyms: centring, direction, focal point, focus, focusing, focussing |
| centerline | (noun) a line that bisects a plane figure | Synonyms: center line |
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| centerpiece | (noun) something placed at the center of something else (as on a table) | Synonyms: centrepiece |
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| (noun) the central or most important feature | Synonyms: centrepiece |
| centesimo | (noun) a fractional monetary unit of several countries: Panama and Italy and Uruguay and Chile | - |
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| centesis | (noun) (surgery) the act of puncturing a body cavity or organ with a hollow needle in order to draw out fluid | - |
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| centile | (noun) (statistics) any of the 99 numbered points that divide an ordered set of scores into 100 parts each of which contains one-hundredth of the total | Synonyms: percentile |
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| centiliter | (noun) a metric unit of volume equal to one hundredth of a liter | Synonyms: centilitre, cl |
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| centilitre | (noun) a metric unit of volume equal to one hundredth of a liter | Synonyms: centiliter, cl |
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| centime | (noun) a coin worth one-hundredth of the value of the basic unit | Synonyms: cent, penny |
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| (noun) a fractional monetary unit of several countries: France and Algeria and Belgium and Burkina Faso and Burundi and Cameroon and Chad and the Congo and Gabon and Haiti and the Ivory Coast and Luxembourg and Mali and Morocco and Niger and Rwanda and Senegal and Switzerland and Togo | - |
| centimeter | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimetre, cm |
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| centimetre | (noun) a metric unit of length equal to one hundredth of a meter | Synonyms: centimeter, cm |
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| centimo | (noun) a fractional monetary unit of Venezuela and Costa Rica and Equatorial Guinea and Paraguay and Spain | - |
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