| control | (noun) the activity of managing or exerting control over something | - |
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| (noun) (physiology) regulation or maintenance of a function or action or reflex etc | - |
| (noun) a mechanism that controls the operation of a machine | Synonyms: controller |
| (noun) power to direct or determine | - |
| (noun) discipline in personal and social activities | Synonyms: restraint |
| (noun) great skillfulness and knowledge of some subject or activity | Synonyms: command, mastery |
| (noun) a standard against which other conditions can be compared in a scientific experiment | Synonyms: control condition |
| (noun) the economic policy of controlling or limiting or curbing prices or wages etc. | - |
| (noun) a spiritual agency that is assumed to assist the medium during a seance | - |
| (noun) a relation of constraint of one entity (thing or person or group) by another | - |
| (noun) the state that exists when one person or group has power over another | Synonyms: ascendance, ascendancy, ascendence, ascendency, dominance |
| controller | (noun) a mechanism that controls the operation of a machine | Synonyms: control |
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| (noun) someone who maintains and audits business accounts | Synonyms: accountant, comptroller |
| (noun) a person who directs and restrains | Synonyms: restrainer |
| controllership | (noun) the position of controller | - |
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| convolution | (noun) the action of coiling or twisting or winding together | - |
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| (noun) a convex fold or elevation in the surface of the brain | Synonyms: gyrus |
| (noun) the shape of something rotating rapidly | Synonyms: swirl, vortex, whirl |
| convolvulus | (noun) any of numerous plants of the genus Convolvulus | - |
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| cool | (noun) the quality of being at a refreshingly low temperature | - |
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| (noun) great coolness and composure under strain | Synonyms: aplomb, assuredness, poise, sang-froid |
| coolant | (noun) a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another | - |
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| cooler | (noun) a refrigerator for cooling liquids | Synonyms: ice chest |
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| (noun) a cell for violent prisoners | Synonyms: tank |
| (noun) an iced drink especially white wine and fruit juice | - |
| coolie | (noun) (ethnic slur) an offensive name for an unskilled Asian laborer | Synonyms: cooly |
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| cooling | (noun) a mechanism for keeping something cool | Synonyms: cooling system |
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| (noun) the process of becoming cooler; a falling temperature | Synonyms: chilling, temperature reduction |
| coolness | (noun) the property of being moderately cold | Synonyms: chilliness, nip |
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| (noun) a lack of affection or enthusiasm | Synonyms: chilliness, coldness, frigidity, frigidness, iciness |
| (noun) fearless self-possession in the face of danger | Synonyms: nervelessness |
| (noun) calm and unruffled self-assurance | Synonyms: imperturbability, imperturbableness |
| coolwart | (noun) stoloniferous white-flowered spring-blooming woodland plant | Synonyms: false miterwort, false mitrewort, foamflower, Tiarella cordifolia |
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| cooly | (noun) (ethnic slur) an offensive name for an unskilled Asian laborer | Synonyms: coolie |
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| copolymer | (noun) a polymer consisting of two or more different monomers | - |
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| coprolalia | (noun) an uncontrollable use of obscene language; often accompanied by mental disorders | - |
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| coprolite | (noun) fossil excrement; petrified dung | - |
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| coprolith | (noun) a hard mass of fecal matter | Synonyms: faecalith, fecalith, stercolith |
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| copyhold | (noun) a medieval form of land tenure in England; a copyhold was a parcel of land granted to a peasant by the lord of the manor in return for agricultural services | - |
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| copyholder | (noun) mechanical device used in printing; holds the copy for the compositor | - |
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| corolla | (noun) (botany) the whorl of petals of a flower that collectively form an inner floral envelope or layer of the perianth | - |
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| corollary | (noun) (logic) an inference that follows directly from the proof of another proposition | - |
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| (noun) a practical consequence that follows naturally | - |
| cortisol | (noun) an adrenal-cortex hormone (trade names Hydrocortone or Cortef) that is active in carbohydrate and protein metabolism | Synonyms: Cortef, hydrocortisone, Hydrocortone |
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| cosmetologist | (noun) an expert in the use of cosmetics | - |
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| cosmetology | (noun) the practice of beautifying the face and hair and skin | - |
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| cosmolatry | (noun) the worship of the cosmos | - |
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| cosmologist | (noun) an astronomer who studies the evolution and space-time relations of the universe | - |
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| cosmology | (noun) the branch of astrophysics that studies the origin and evolution and structure of the universe | Synonyms: cosmogeny, cosmogony |
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| (noun) the metaphysical study of the origin and nature of the universe | - |
| cosmopolitan | (noun) a sophisticated person who has travelled in many countries | Synonyms: cosmopolite |
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| cosmopolitanity | (noun) a state or quality of being cosmopolitan | - |
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| cosmopolite | (noun) a sophisticated person who has travelled in many countries | Synonyms: cosmopolitan |
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| counterrevolution | (noun) a revolution whose aim is to reverse the changes introduced by a previous revolution | - |
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| counterrevolutionary | (noun) a revolutionary whose aim is to reverse the changes introduced by an earlier revolution | Synonyms: counter-revolutionist, counterrevolutionist |
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| counterrevolutionist | (noun) a revolutionary whose aim is to reverse the changes introduced by an earlier revolution | Synonyms: counter-revolutionist, counterrevolutionary |
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| countryfolk | (noun) people raised in or living in a rural environment; rustics | Synonyms: country people |
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| (noun) people living in the same country; compatriots | Synonyms: country people |
| coyol | (noun) tropical American palm having edible nuts and yielding a useful fiber | Synonyms: Acrocomia vinifera, coyol palm |
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| craniologist | (noun) someone who claims to be able to read your character from the shape of your skull | Synonyms: phrenologist |
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| craniology | (noun) the scientific study of the skulls of various human races | - |
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| creole | (noun) a mother tongue that originates from contact between two languages | - |
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| creosol | (noun) a colorless to yellow aromatic liquid that is a constituent of creosote | - |
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| cresol | (noun) any of three poisonous colorless isomeric phenols; derived from coal or wood tar; used as a disinfectant | Synonyms: methyl phenol |
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| criminologist | (noun) a specialist in criminology | - |
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| criminology | (noun) the scientific study of crime and criminal behavior and law enforcement | - |
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| crinoline | (noun) a stiff coarse fabric used to stiffen hats or clothing | - |
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| (noun) a full stiff petticoat made of crinoline fabric | - |
| (noun) a skirt stiffened with hoops | Synonyms: hoopskirt |
| criollo | (noun) cocoa of superior quality | - |
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| (noun) a Spanish American of pure European stock (usually Spanish) | - |
| crocolite | (noun) a rare lead chromite mineral that forms bright orange crystals | - |
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| cryobiology | (noun) the branch of biology that studies the effects of low temperatures on living tissues or organs or organisms | - |
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| cryolite | (noun) a white mineral consisting of fluorides of aluminum and sodium; a source of fluorine | Synonyms: Greenland spar |
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| cryptologist | (noun) decoder skilled in the analysis of codes and cryptograms | Synonyms: cryptanalyst, cryptographer |
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| cryptology | (noun) the science of analyzing and deciphering codes and ciphers and cryptograms | Synonyms: cryptanalysis, cryptanalytics, cryptography |
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| cubbyhole | (noun) a small compartment | Synonyms: pigeonhole |
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| (noun) a small secluded room | Synonyms: cubby, snug, snuggery |
| cuckold | (noun) a man whose wife committed adultery | - |
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| cuckolding | (noun) A sexual act where a married person has sex with another person while their spouse watches | - |
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| cuckoldom | (noun) the state of a husband whose wife has committed adultery | - |
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| cuckoldry | (noun) the practice of making cuckolds; sexual conquests of married women | - |
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| cupola | (noun) a roof in the form of a dome | - |
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| (noun) a vertical cylindrical furnace for melting iron for casting | - |
| cyclohexanol | (noun) a colorless oily alcohol that smells like camphor | - |
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| cycloolefin | (noun) alkene hydrocarbon which contains a closed ring of carbon atoms, but has no aromatic character. | Synonyms: cycloalkene |
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| cystolith | (noun) a calculus formed in the bladder | Synonyms: bladder stone |
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| cytol | (noun) the protoplasm of a cell excluding the nucleus; is full of proteins that control cell metabolism | Synonyms: cytoplasm |
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| cytologist | (noun) a biologist who studies the structure and function of cells | - |
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| cytology | (noun) the branch of biology that studies the structure and function of cells | - |
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| cytolysin | (noun) a substance that partly or completely destroys animal cells | - |
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| cytolysis | (noun) pathological breakdown of cells by the destruction of their outer membrane | - |
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| cytosol | (noun) the aqueous part of the cytoplasm within which various particles and organelles are suspended | - |
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| deadbolt | (noun) the part of a lock that is engaged or withdrawn with a key | Synonyms: bolt |
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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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| defoliant | (noun) a chemical that is sprayed on plants and causes their leaves to fall off | - |
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| defoliation | (noun) causing the leaves of trees and other plants to fall off (as by the use of chemicals) | - |
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| (noun) the loss of foliage | - |
| defoliator | (noun) an insect that strips the leaves from plants | - |
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| dehydroretinol | (noun) a viscous alcohol that is less active in mammals than is vitamin A1 | Synonyms: vitamin A2 |
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| demolishing | (noun) complete destruction of a building | Synonyms: leveling, razing, tearing down |
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| demolition | (noun) the act of demolishing | - |
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| (noun) an event that completely destroys something | Synonyms: destruction, wipeout |
| demonolatry | (noun) the acts or rites of worshiping devils | Synonyms: devil-worship, diabolatry |
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| demythologisation | (noun) the restatement of a message (as a religious one) in rational terms | Synonyms: demythologization |
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| demythologization | (noun) the restatement of a message (as a religious one) in rational terms | Synonyms: demythologisation |
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| dendrology | (noun) the study of wooden plants | - |
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| depolarisation | (noun) a loss of polarity or polarization | Synonyms: depolarization |
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| depolarization | (noun) a loss of polarity or polarization | Synonyms: depolarisation |
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| dermatologist | (noun) a doctor who specializes in the physiology and pathology of the skin | Synonyms: skin doctor |
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| dermatology | (noun) the branch of medicine dealing with the skin and its diseases | - |
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| desolation | (noun) an event that results in total destruction | Synonyms: devastation |
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| (noun) sadness resulting from being forsaken or abandoned | Synonyms: forlornness, loneliness |
| (noun) the state of being decayed or destroyed | Synonyms: devastation |
| (noun) a bleak and desolate atmosphere | Synonyms: bareness, bleakness, nakedness |
| despoliation | (noun) the act of stripping and taking by force | Synonyms: despoilation, despoilment, spoil, spoilation, spoliation |
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| devolution | (noun) the delegation of authority (especially from a central to a regional government) | Synonyms: devolvement |
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| (noun) the process of declining from a higher to a lower level of effective power or vitality or essential quality | Synonyms: degeneration |
| devolvement | (noun) the delegation of authority (especially from a central to a regional government) | Synonyms: devolution |
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| dhole | (noun) fierce wild dog of the forests of central and southeast Asia that hunts in packs | Synonyms: Cuon alpinus |
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| diabolatry | (noun) the acts or rites of worshiping devils | Synonyms: demonolatry, devil-worship |
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| diabolism | (noun) a belief in and reverence for devils (especially Satan) | Synonyms: demonism, Satanism |
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| diabolist | (noun) an adherent of Satan or Satanism | Synonyms: Satanist |
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| dialectology | (noun) the branch of philology that is devoted to the study of dialects | - |
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| diastole | (noun) the widening of the chambers of the heart between two contractions when the chambers fill with blood | - |
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| dicoumarol | (noun) an anticoagulant drug that has now been largely replaced by warfarin | Synonyms: dicumarol |
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| dicumarol | (noun) an anticoagulant drug that has now been largely replaced by warfarin | Synonyms: dicoumarol |
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| dielectrolysis | (noun) the motion of charged particles in a colloid under the influence of an electric field; particles with a positive charge go to the cathode and negative to the anode | Synonyms: cataphoresis, electrophoresis, ionophoresis |
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| diethylstilbesterol | (noun) synthetic nonsteroid with the properties of estrogen; formerly used to treat menstrual problems but was found to be associated with vaginal cancers in the daughters of women so treated during pregnancy | Synonyms: DES, stilbesterol |
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| diethylstilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilboestrol, stilbestrol, stilboestrol |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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| diol | (noun) any of a class of alcohols having 2 hydroxyl groups in each molecule | Synonyms: dihydric alcohol, glycol |
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| dipole | (noun) an aerial half a wavelength long consisting of two rods connected to a transmission line at the center | Synonyms: dipole antenna |
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| (noun) a pair of equal and opposite electric charges or magnetic poles separated by a small distance | - |