| catecholamine | (noun) any of a group of chemicals including epinephrine and norepinephrine that are produced in the medulla of the adrenal gland | - |
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| catechu | (noun) East Indian spiny tree having twice-pinnate leaves and yellow flowers followed by flat pods; source of black catechu | Synonyms: Acacia catechu, Jerusalem thorn |
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| (noun) extract of the heartwood of Acacia catechu used for dyeing and tanning and preserving fishnets and sails; formerly used medicinally | Synonyms: black catechu |
| catechumen | (noun) a new convert being taught the principles of Christianity by a catechist | Synonyms: neophyte |
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| categorem | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categoreme |
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| categoreme | (noun) a categorematic expression; a term capable of standing alone as the subject or predicate of a logical proposition | Synonyms: categorem |
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| categorisation | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorization, classification, compartmentalisation, compartmentalization |
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| (noun) the basic cognitive process of arranging into classes or categories | Synonyms: categorization, classification, sorting |
| (noun) a group of people or things arranged by class or category | Synonyms: categorization, classification |
| categorization | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorisation, classification, compartmentalisation, compartmentalization |
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| (noun) the basic cognitive process of arranging into classes or categories | Synonyms: categorisation, classification, sorting |
| (noun) a group of people or things arranged by class or category | Synonyms: categorisation, classification |
| category | (noun) a general concept that marks divisions or coordinations in a conceptual scheme | - |
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| (noun) a collection of things sharing a common attribute | Synonyms: class, family |
| catena | (noun) a chain of connected ideas or passages or objects so arranged that each member is closely related to the preceding and following members (especially a series of patristic comments elucidating Christian dogma) | - |
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| catenary | (noun) the curve theoretically assumed by a perfectly flexible and inextensible cord of uniform density and cross section hanging freely from two fixed points | - |
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| caterer | (noun) someone who provides food and service (as for a party) | - |
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| catering | (noun) providing food and services | - |
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| caterpillar | (noun) a wormlike and often brightly colored and hairy or spiny larva of a butterfly or moth | - |
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| caterwaul | (noun) the yowling sound made by a cat in heat | - |
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| catfish | (noun) any of numerous mostly freshwater bottom-living fishes of Eurasia and North America with barbels like whiskers around the mouth | Synonyms: siluriform fish |
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| (noun) large ferocious northern deep-sea food fishes with strong teeth and no pelvic fins | Synonyms: wolf fish, wolffish |
| (noun) flesh of scaleless food fish of the southern United States; often farmed | Synonyms: mudcat |
| catgut | (noun) a strong cord made from the intestines of sheep and used in surgery | Synonyms: gut |
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| (noun) perennial subshrub of eastern North America having downy leaves yellowish and rose flowers and; source of rotenone | Synonyms: goat's rue, Tephrosia virginiana, wild sweet pea |
| catharsis | (noun) (psychoanalysis) purging of emotional tensions | Synonyms: abreaction, katharsis |
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| (noun) purging the body by the use of a cathartic to stimulate evacuation of the bowels | Synonyms: katharsis, purgation |
| cathartic | (noun) a purging medicine; stimulates evacuation of the bowels | Synonyms: aperient, physic, purgative |
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| cathartid | (noun) large birds of prey superficially similar to Old World vultures | Synonyms: New World vulture |
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| cathedra | (noun) a throne that is the official chair of a bishop | Synonyms: bishop's throne |
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| cathedral | (noun) any large and important church | - |
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| (noun) the principal Christian church building of a bishop's diocese | Synonyms: duomo |
| catheter | (noun) a thin flexible tube inserted into the body to permit introduction or withdrawal of fluids or to keep the passageway open | - |
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| catheterisation | (noun) the operation of introducing a catheter into the body | Synonyms: catheterization |
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| catheterization | (noun) the operation of introducing a catheter into the body | Synonyms: catheterisation |
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| cathexis | (noun) (psychoanalysis) the libidinal energy invested in some idea or person or object | Synonyms: charge |
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| cathode | (noun) a negatively charged electrode that is the source of electrons entering an electrical device | - |
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| (noun) the positively charged terminal of a voltaic cell or storage battery that supplies current | - |
| catholicity | (noun) the quality of being universal; existing everywhere | Synonyms: universality |
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| catholicon | (noun) hypothetical remedy for all ills or diseases; once sought by the alchemists | Synonyms: cure-all, nostrum, panacea |
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| cathouse | (noun) a building where prostitutes are available | Synonyms: bagnio, bawdyhouse, bordello, brothel, house of ill repute, house of prostitution, sporting house, whorehouse |
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| cation | (noun) a positively charged ion | - |
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| catkin | (noun) a cylindrical spikelike inflorescence | Synonyms: ament |
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| catling | (noun) a long double-edged knife used for amputations | - |
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| catmint | (noun) hairy aromatic perennial herb having whorls of small white purple-spotted flowers in a terminal spike; used in the past as a domestic remedy; strongly attractive to cats | Synonyms: catnip, Nepeta cataria |
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| catnap | (noun) sleeping for a short period of time (usually not in bed) | Synonyms: forty winks, light sleep, nap, short sleep, snooze |
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| catnip | (noun) hairy aromatic perennial herb having whorls of small white purple-spotted flowers in a terminal spike; used in the past as a domestic remedy; strongly attractive to cats | Synonyms: catmint, Nepeta cataria |
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| catoptrics | (noun) branch of optics dealing with formation of images by mirrors | - |
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| catostomid | (noun) a cypriniform fish of the family Catostomidae | - |
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| catsup | (noun) thick spicy sauce made from tomatoes | Synonyms: cetchup, ketchup, tomato ketchup |
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| cattail | (noun) tall erect herbs with sword-shaped leaves; cosmopolitan in fresh and salt marshes | - |
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| cattalo | (noun) hardy breed of cattle resulting from crossing domestic cattle with the American buffalo; yields leaner beef than conventional breeds | Synonyms: beefalo |
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| cattie | (noun) any of various units of weight used in southeastern Asia (especially a Chinese measure equal to 500 grams) | Synonyms: catty |
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| cattiness | (noun) malevolence by virtue of being malicious or spiteful or nasty | Synonyms: bitchiness, nastiness, spite, spitefulness |
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| cattle | (noun) domesticated bovine animals as a group regardless of sex or age | Synonyms: Bos taurus, cows, kine, oxen |
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| cattleman | (noun) a man who raises (or tends) cattle | Synonyms: beef man, cow man |
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| (noun) a male hired hand who tends cattle and performs other duties on horseback | Synonyms: cowboy, cowman |
| cattleship | (noun) a cargo ship for the transport of livestock | Synonyms: cattle boat |
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| cattleya | (noun) any orchid of the genus Cattleya characterized by a three-lobed lip enclosing the column; among the most popular and most extravagantly beautiful orchids known | - |
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| catty | (noun) any of various units of weight used in southeastern Asia (especially a Chinese measure equal to 500 grams) | Synonyms: cattie |
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| catwalk | (noun) narrow pathway high in the air (as above a stage or between parts of a building or along a bridge) | - |
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| (noun) narrow platform extending out into an auditorium | - |
| certificate | (noun) a document attesting to the truth of certain stated facts | Synonyms: certification, credential, credentials |
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| (noun) a formal declaration that documents a fact of relevance to finance and investment; the holder has a right to receive interest or dividends | Synonyms: security |
| certification | (noun) the act of certifying or bestowing a franchise on | Synonyms: enfranchisement |
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| (noun) validating the authenticity of something or someone | Synonyms: authentication |
| (noun) confirmation that some fact or statement is true through the use of documentary evidence | Synonyms: corroboration, documentation |
| (noun) a document attesting to the truth of certain stated facts | Synonyms: certificate, credential, credentials |
| cicatrice | (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrix, scar |
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| cicatrix | (noun) a mark left (usually on the skin) by the healing of injured tissue | Synonyms: cicatrice, scar |
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| clarification | (noun) the act of removing solid particles from a liquid | Synonyms: clearing |
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| (noun) an interpretation that removes obstacles to understanding | Synonyms: elucidation, illumination |
| classification | (noun) the act of distributing things into classes or categories of the same type | Synonyms: assortment, categorisation, categorization, compartmentalisation, compartmentalization |
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| (noun) restriction imposed by the government on documents or weapons that are available only to certain authorized people | - |
| (noun) the basic cognitive process of arranging into classes or categories | Synonyms: categorisation, categorization, sorting |
| (noun) a group of people or things arranged by class or category | Synonyms: categorisation, categorization |
| claudication | (noun) disability of walking due to crippling of the legs or feet | Synonyms: gameness, gimp, gimpiness, lameness, limping |
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| codification | (noun) the act of codifying; arranging in a systematic order | - |
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| (noun) a set of rules or principles or laws (especially written ones) | Synonyms: code |
| coeducation | (noun) education of men and women in the same institutions | - |
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| collocation | (noun) the act of positioning close together (or side by side) | Synonyms: apposition, juxtaposition |
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| (noun) a grouping of words in a sentence | - |
| communicating | (noun) the activity of communicating; the activity of conveying information | Synonyms: communication |
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| communication | (noun) something that is communicated by or to or between people or groups | - |
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| (noun) the activity of communicating; the activity of conveying information | Synonyms: communicating |
| (noun) a connection allowing access between persons or places | - |
| communications | (noun) the discipline that studies the principles of transmitting information and the methods by which it is delivered (as print or radio or television etc.) | Synonyms: communication theory |
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| communicativeness | (noun) the trait of being communicative | - |
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| communicator | (noun) a person who communicates with others | - |
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| complicatedness | (noun) puzzling complexity | Synonyms: complication, knottiness, tortuousness |
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| complication | (noun) the act or process of complicating | - |
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| (noun) puzzling complexity | Synonyms: complicatedness, knottiness, tortuousness |
| (noun) a development that complicates a situation | Synonyms: ramification |
| (noun) a situation or condition that is complex or confused | - |
| (noun) any disease or disorder that occurs during the course of (or because of) another disease | - |
| concatenation | (noun) the act of linking together as in a series or chain | - |
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| (noun) a series of things depending on each other as if linked together | Synonyms: chain |
| (noun) the linking together of a consecutive series of symbols or events or ideas etc | - |
| (noun) the state of being linked together as in a chain; union in a linked series | - |
| confiscation | (noun) seizure by the government | Synonyms: arrogation |
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| contraindication | (noun) (medicine) a reason that makes it inadvisable to prescribe a particular drug or employ a particular procedure or treatment | - |
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| convocation | (noun) the act of convoking | Synonyms: calling together |
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| (noun) a group gathered in response to a summons | - |
| copycat | (noun) someone who copies the words or behavior of another | Synonyms: ape, aper, emulator, imitator |
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| coruscation | (noun) a sudden or striking display of brilliance | - |
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| (noun) the occurrence of a small flash or spark | Synonyms: glitter, sparkle |
| cowcatcher | (noun) an inclined metal frame at the front of a locomotive to clear the track | Synonyms: buffer, fender, pilot |
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| decalcification | (noun) loss of calcium from bones or teeth | - |
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| decathlon | (noun) an athletic contest consisting of ten different events | - |
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| declassification | (noun) reduction or removal by the government of restrictions on a classified document or weapon | - |
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| decortication | (noun) removal of the outer covering of an organ or part | - |
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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 | - |
| 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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| 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 |
| deification | (noun) the elevation of a person (as to the status of a god) | Synonyms: apotheosis, exaltation |
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| (noun) an embodiment of the qualities of a god | - |
| (noun) the condition of being treated like a god | - |
| delicatessen | (noun) a shop selling ready-to-eat food products | Synonyms: deli, food shop |
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| (noun) ready-to-eat food products | Synonyms: delicatessen food |
| demarcation | (noun) a conceptual separation or distinction | Synonyms: contrast, dividing line, line |
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| (noun) the boundary of a specific area | Synonyms: demarcation line, limit |
| denazification | (noun) social process of removing Nazis from official positions and giving up any allegiance to Nazism | Synonyms: de-Nazification |
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| densification | (noun) an increase in the density of something | Synonyms: compaction, compression, concretion |
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| deossification | (noun) the loss of the mineral content of bone tissue | - |
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| deprecatio | (noun) a praying against evil, against others, or oneself; a prayer for the removal of some evil. | - |
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| deprecation | (noun) the act of expressing disapproval (especially of yourself) | Synonyms: denigration |
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| (noun) a prayer to avert or remove some evil or disaster | - |
| desertification | (noun) the gradual transformation of habitable land into desert; is usually caused by climate change or by destructive use of the land | - |
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| desiccation | (noun) the process of extracting moisture | Synonyms: dehydration, drying up, evaporation |
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| (noun) dryness resulting from the removal of water | Synonyms: dehydration |
| detoxification | (noun) treatment for poisoning by neutralizing the toxic properties (normally a function of the liver) | - |
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| (noun) a treatment for addiction to drugs or alcohol intended to remove the physiological effects of the addictive substances | - |
| dislocation | (noun) the act of disrupting an established order so it fails to continue | Synonyms: breakdown |
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| (noun) an event that results in a displacement or discontinuity | Synonyms: disruption |
| (noun) a displacement of a part (especially a bone) from its normal position (as in the shoulder or the vertebral column) | - |
| disqualification | (noun) the act of preventing someone from participating by finding them unqualified | - |
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| (noun) unfitness that bars you from participation | - |
| divarication | (noun) branching at a wide angle | - |
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| diversification | (noun) the act of introducing variety (especially in investments or in the variety of goods and services offered) | Synonyms: variegation |
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| (noun) the condition of being varied | - |
| domestication | (noun) accommodation to domestic life | - |
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| (noun) the attribute of having been domesticated | Synonyms: tameness |
| (noun) adaptation to intimate association with human beings | - |
| ducat | (noun) formerly a gold coin of various European countries | - |
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| duplicate | (noun) a copy that corresponds to an original exactly | Synonyms: duplication |
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| (noun) something additional of the same kind | Synonyms: extra |
| duplication | (noun) the act of copying or making a duplicate (or duplicates) of something | Synonyms: gemination |
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| (noun) a copy that corresponds to an original exactly | Synonyms: duplicate |