| dictator | (noun) a ruler who is unconstrained by law | Synonyms: potentate |
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| (noun) a person who behaves in a tyrannical manner | Synonyms: authoritarian |
| (noun) a speaker who dictates to a secretary or a recording machine | - |
| dictatorship | (noun) a form of government in which the ruler is an absolute dictator (not restricted by a constitution or laws or opposition etc.) | Synonyms: absolutism, authoritarianism, Caesarism, despotism, monocracy, one-man rule, shogunate, Stalinism, totalitarianism, tyranny |
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| diction | (noun) the manner in which something is expressed in words | Synonyms: choice of words, phraseology, phrasing, verbiage, wording |
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| (noun) the articulation of speech regarded from the point of view of its intelligibility to the audience | Synonyms: enunciation |
| dictionary | (noun) a reference book containing an alphabetical list of words with information about them | Synonyms: lexicon |
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| dictostylium | (noun) any slime mold of the genus Dictostylium | - |
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| dictum | (noun) an authoritative declaration | Synonyms: pronouncement, say-so |
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| (noun) an opinion voiced by a judge on a point of law not directly bearing on the case in question and therefore not binding | Synonyms: obiter dictum |
| dictyosome | (noun) a netlike structure in the cytoplasm of animal cells (especially in those cells that produce secretions) | Synonyms: Golgi apparatus, Golgi body, Golgi complex |
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| didacticism | (noun) communication that is suitable for or intended to be instructive | - |
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| didactics | (noun) the activities of educating or instructing; activities that impart knowledge or skill | Synonyms: education, educational activity, instruction, pedagogy, teaching |
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| dielectric | (noun) a material such as glass or porcelain with negligible electrical or thermal conductivity | Synonyms: insulator, nonconductor |
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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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| diffraction | (noun) when light passes sharp edges or goes through narrow slits the rays are deflected and produce fringes of light and dark bands | - |
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| direction | (noun) the act of managing something | Synonyms: management |
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| (noun) the act of setting and holding a course | Synonyms: guidance, steering |
| (noun) a general course along which something has a tendency to develop | - |
| (noun) the concentration of attention or energy on something | Synonyms: centering, centring, focal point, focus, focusing, focussing |
| (noun) something that provides direction or advice as to a decision or course of action | Synonyms: counsel, counseling, counselling, guidance |
| (noun) a formal statement of a command or injunction to do something | Synonyms: charge, commission |
| (noun) a message describing how something is to be done | Synonyms: instruction |
| (noun) a line leading to a place or point | Synonyms: way |
| (noun) the spatial relation between something and the course along which it points or moves | - |
| directionality | (noun) the property of a microphone or antenna of being more sensitive in one direction than in another | Synonyms: directivity |
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| (noun) the property of being directional or maintaining a direction | - |
| directioner | (noun) a fan on the band One Direction | - |
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| directive | (noun) a pronouncement encouraging or banning some activity | - |
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| directiveness | (noun) the quality of being directive | Synonyms: directivity |
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| directivity | (noun) the property of a microphone or antenna of being more sensitive in one direction than in another | Synonyms: directionality |
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| (noun) the quality of being directive | Synonyms: directiveness |
| directmate | (noun) A type of problem where White, moving first, is required to checkmate Black in a specified number of moves against any defence. | - |
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| directness | (noun) trueness of course toward a goal | Synonyms: straightness |
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| (noun) the quality of being honest and straightforward in attitude and speech | Synonyms: candidness, candor, candour, forthrightness, frankness |
| director | (noun) someone who controls resources and expenditures | Synonyms: manager, managing director |
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| (noun) the person who leads a musical group | Synonyms: conductor, music director |
| (noun) someone who supervises the actors and directs the action in the production of a show | Synonyms: theater director, theatre director |
| (noun) member of a board of directors | - |
| (noun) the person who directs the making of a film | Synonyms: film director |
| directorate | (noun) a group of persons chosen to govern the affairs of a corporation or other large institution | Synonyms: board of directors |
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| directorship | (noun) the position of a director of a business concern | - |
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| directory | (noun) an alphabetical list of names and addresses | - |
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| (noun) (computer science) a listing of the files stored in memory (usually on a hard disk) | - |
| disaffection | (noun) disloyalty to the government or to established authority | - |
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| (noun) the feeling of being alienated from other people | Synonyms: alienation, estrangement |
| disconnect | (noun) an unbridgeable disparity (as from a failure of understanding) | Synonyms: disconnection, gulf |
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| disconnectedness | (noun) state of being disconnected | Synonyms: disconnection, disjunction, disjuncture |
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| disconnection | (noun) the act of breaking a connection | Synonyms: disjunction |
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| (noun) an unbridgeable disparity (as from a failure of understanding) | Synonyms: disconnect, gulf |
| (noun) state of being disconnected | Synonyms: disconnectedness, disjunction, disjuncture |
| disfunction | (noun) (medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group | Synonyms: dysfunction |
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| disinfectant | (noun) an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease | Synonyms: antimicrobial, antimicrobic, germicide |
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| disinfection | (noun) treatment to destroy harmful microorganisms | - |
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| disinfector | (noun) an apparatus for applying disinfectants. | - |
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| disjunction | (noun) the act of breaking a connection | Synonyms: disconnection |
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| (noun) state of being disconnected | Synonyms: disconnectedness, disconnection, disjuncture |
| disjuncture | (noun) state of being disconnected | Synonyms: disconnectedness, disconnection, disjunction |
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| disrespect | (noun) a manner that is generally disrespectful and contemptuous | Synonyms: contempt |
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| (noun) a disrespectful mental attitude | - |
| (noun) an expression of lack of respect | Synonyms: discourtesy |
| dissatisfaction | (noun) the feeling of being displeased and discontent | - |
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| dissection | (noun) cutting so as to separate into pieces | - |
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| (noun) detailed critical analysis or examination one part at a time (as of a literary work) | - |
| (noun) a minute and critical analysis | - |
| distinction | (noun) a distinguishing difference between similar things or people | - |
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| (noun) a discrimination between things as different and distinct on the basis of their characteristics or attributes | Synonyms: differentiation |
| (noun) an honor awarded to someone in recognition of achievement or superiority | - |
| (noun) high status importance owing to marked superiority | Synonyms: eminence, note, preeminence |
| distinctiveness | (noun) utter dissimilarity | Synonyms: disparateness |
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| (noun) a distinguishing trait | Synonyms: peculiarity, speciality, specialness, specialty |
| distinctness | (noun) the quality of being sharp and clear | Synonyms: sharpness |
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| (noun) the quality of being not alike; being distinct or different from that otherwise experienced or known | Synonyms: otherness, separateness |
| (noun) the state of being several and distinct | Synonyms: discreteness, separateness, severalty |
| distraction | (noun) an entertainment that provokes pleased interest and distracts you from worries and vexations | Synonyms: beguilement |
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| (noun) the act of distracting; drawing someone's attention away from something | Synonyms: misdirection |
| (noun) mental turmoil | - |
| (noun) an obstacle to attention | - |
| district | (noun) a region marked off for administrative or other purposes | Synonyms: dominion, territorial dominion, territory |
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| doctor | (noun) children take the roles of physician or patient or nurse and pretend they are at the physician's office | - |
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| (noun) a licensed medical practitioner | Synonyms: doc, Dr., MD, medico, physician |
| (noun) a person who holds Ph.D. degree (or the equivalent) from an academic institution | Synonyms: Dr. |
| doctorate | (noun) one of the highest earned academic degrees conferred by a university | Synonyms: doctor's degree |
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| doctorfish | (noun) surgeon fish of the West Indies | Synonyms: Acanthurus chirurgus, doctor-fish |
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| doctorspeak | (noun) medical jargon | - |
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| doctrinaire | (noun) a stubborn person of arbitrary or arrogant opinions | Synonyms: dogmatist |
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| doctrine | (noun) a belief (or system of beliefs) accepted as authoritative by some group or school | Synonyms: ism, philosophical system, philosophy, school of thought |
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| duct | (noun) an enclosed conduit for a fluid | - |
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| (noun) a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance | Synonyms: canal, channel, epithelial duct |
| (noun) a continuous tube formed by a row of elongated cells lacking intervening end walls | - |
| ductileness | (noun) the malleability of something that can be drawn into threads or wires or hammered into thin sheets | Synonyms: ductility |
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| ductility | (noun) the malleability of something that can be drawn into threads or wires or hammered into thin sheets | Synonyms: ductileness |
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| ductule | (noun) a very small duct | Synonyms: ductulus |
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| ductulus | (noun) a very small duct | Synonyms: ductule |
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| dysfunction | (noun) (medicine) any disturbance in the functioning of an organ or body part or a disturbance in the functioning of a social group | Synonyms: disfunction |
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| dysfunctionality | (noun) The condition of functioning incorrectly or abnormally. | - |
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| dyslectic | (noun) a person who has dyslexia | Synonyms: dyslexic |
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| echinocactus | (noun) any cactus of the genus Echinocactus; strongly ribbed and very spiny; southwestern United States to Brazil | Synonyms: barrel cactus |
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| eclectic | (noun) someone who selects according to the eclectic method | Synonyms: eclecticist |
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| eclecticism | (noun) making decisions on the basis of what seems best instead of following some single doctrine or style | Synonyms: eclectic method |
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| eclecticist | (noun) someone who selects according to the eclectic method | Synonyms: eclectic |
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| ectasia | (noun) dilatation or distension of a hollow organ | Synonyms: ectasis |
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| ectasis | (noun) dilatation or distension of a hollow organ | Synonyms: ectasia |
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| ectoblast | (noun) the outer germ layer that develops into skin and nervous tissue | Synonyms: ectoderm, exoderm |
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| ectoderm | (noun) the outer germ layer that develops into skin and nervous tissue | Synonyms: ectoblast, exoderm |
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| ectomorph | (noun) a person with a thin body | - |
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| ectomorphy | (noun) slender, weak, and lightweight | Synonyms: asthenic type |
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| ectoparasite | (noun) any external parasitic organism (as fleas) | Synonyms: ectozoan, ectozoon, epizoan, epizoon |
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| ectopia | (noun) abnormal position of a part or organ (especially at the time of birth) | - |
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| ectoplasm | (noun) the outer granule-free layer of cytoplasm | - |
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| (noun) (spiritualism) a substance supposed to emanate from the body of the medium during a trance | - |
| ectoproct | (noun) sessile mossy aquatic animal having the anus of the polyp outside the crown of tentacles | - |
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| ectotherm | (noun) an animal whose body temperature varies with the temperature of its surroundings; any animal except birds and mammals | Synonyms: poikilotherm |
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| ectozoan | (noun) any external parasitic organism (as fleas) | Synonyms: ectoparasite, ectozoon, epizoan, epizoon |
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| ectozoon | (noun) any external parasitic organism (as fleas) | Synonyms: ectoparasite, ectozoan, epizoan, epizoon |
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| ectrodactyly | (noun) congenital abnormality involving the absence of some fingers or toes | - |
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| edict | (noun) a legally binding command or decision entered on the court record (as if issued by a court or judge) | Synonyms: decree, fiat, order, rescript |
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| (noun) a formal or authoritative proclamation | - |
| effect | (noun) an outward appearance | Synonyms: impression |
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| (noun) (of a law) having legal validity | Synonyms: force |
| (noun) an impression (especially one that is artificial or contrived) | - |
| (noun) the central meaning or theme of a speech or literary work | Synonyms: burden, core, essence, gist |
| (noun) a phenomenon that follows and is caused by some previous phenomenon | Synonyms: consequence, event, issue, outcome, result, upshot |
| (noun) a symptom caused by an illness or a drug | - |
| effecter | (noun) one who brings about a result or event; one who accomplishes a purpose | Synonyms: effector |
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| effectiveness | (noun) power to be effective; the quality of being able to bring about an effect | Synonyms: effectivity, effectuality, effectualness |
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| (noun) capacity to produce strong physiological or chemical effects | Synonyms: potency, strength |
| effectivity | (noun) power to be effective; the quality of being able to bring about an effect | Synonyms: effectiveness, effectuality, effectualness |
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| effector | (noun) an organ (a gland or muscle) that becomes active in response to nerve impulses | - |
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| (noun) a nerve fiber that terminates on a muscle or gland and stimulates contraction or secretion | - |
| (noun) one who brings about a result or event; one who accomplishes a purpose | Synonyms: effecter |
| effects | (noun) property of a personal character that is portable but not used in business | Synonyms: personal effects |
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| effectuality | (noun) power to be effective; the quality of being able to bring about an effect | Synonyms: effectiveness, effectivity, effectualness |
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| effectualness | (noun) power to be effective; the quality of being able to bring about an effect | Synonyms: effectiveness, effectivity, effectuality |
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| effectuation | (noun) the act of implementing (providing a practical means for accomplishing something); carrying into effect | Synonyms: implementation |
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| ejection | (noun) the act of forcing out someone or something | Synonyms: exclusion, expulsion, riddance |
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| (noun) the act of expelling or projecting or ejecting | Synonyms: expulsion, forcing out, projection |
| ejective | (noun) a type of consonant in some languages, e.g., Hausa, produced by sudden release of pressure from the glottis. | Synonyms: ejective consonant |
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| ejector | (noun) a mechanism in a firearm that ejects the empty shell case after firing | Synonyms: cartridge ejector |
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| (noun) An injector, ejector, steam ejector, steam injector, eductor-jet pump or thermocompressor is a type of pump. | Synonyms: eductor-jet pump, injector, steam ejector, steam injector, thermocompressor |
| (noun) a person who ousts or supplants someone else | Synonyms: ouster |
| elect | (noun) an exclusive group of people | Synonyms: chosen |
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| election | (noun) the act of selecting someone or something; the exercise of deliberate choice | - |
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| (noun) a vote to select the winner of a position or political office | - |
| (noun) the predestination of some individuals as objects of divine mercy (especially as conceived by Calvinists) | - |
| (noun) the status or fact of being elected | - |
| electioneering | (noun) the campaign of a candidate to be elected | Synonyms: campaigning, candidacy, candidature, political campaign |
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| (noun) persuasion of voters in a political campaign | Synonyms: bell ringing, canvassing |
| elective | (noun) a course that the student can select from among alternatives | Synonyms: elective course |
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| electiveness | (noun) Quality or state in which choice or discretion is allowed. | Synonyms: optionality |
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| elector | (noun) a citizen who has a legal right to vote | Synonyms: voter |
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| electorate | (noun) the body of enfranchised citizens; those qualified to vote | - |
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| electric | (noun) a car that is powered by electricity | Synonyms: electric automobile, electric car |
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| electrician | (noun) a person who installs or repairs electrical or telephone lines | Synonyms: lineman, linesman |
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| electricity | (noun) keen and shared excitement | - |
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| (noun) a physical phenomenon associated with stationary or moving electrons and protons | - |
| (noun) energy made available by the flow of electric charge through a conductor | Synonyms: electrical energy, power |
| electrification | (noun) the activity of thrilling or markedly exciting some person or group | - |
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| (noun) the act of providing electricity | - |
| electrocardiogram | (noun) a graphical recording of the cardiac cycle produced by an electrocardiograph | Synonyms: cardiogram, ECG, EKG |
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| electrocardiograph | (noun) medical instrument that records electric currents associated with contractions of the heart | Synonyms: cardiograph |
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