| ecologist | (noun) a biologist who studies the relation between organisms and their environment | - |
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| ecology | (noun) the branch of biology concerned with the relations between organisms and their environment | Synonyms: bionomics, environmental science |
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| (noun) the environment as it relates to living organisms | - |
| econometrician | (noun) an economist who uses statistical and mathematical methods | Synonyms: econometrist |
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| econometrics | (noun) the application of mathematics and statistics to the study of economic and financial data | - |
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| econometrist | (noun) an economist who uses statistical and mathematical methods | Synonyms: econometrician |
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| economics | (noun) the branch of social science that deals with the production and distribution and consumption of goods and services and their management | Synonyms: economic science, political economy |
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| economiser | (noun) a frugal person who limits spending and avoids waste | Synonyms: economizer |
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| economist | (noun) an expert in the science of economics | Synonyms: economic expert |
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| economizer | (noun) a frugal person who limits spending and avoids waste | Synonyms: economiser |
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| economy | (noun) an act of economizing; reduction in cost | Synonyms: saving |
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| (noun) frugality in the expenditure of money or resources | Synonyms: thriftiness |
| (noun) the efficient use of resources | - |
| (noun) the system of production and distribution and consumption | Synonyms: economic system |
| ecosystem | (noun) a system formed by the interaction of a community of organisms with their physical environment | - |
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| ecoterrorism | (noun) violence carried out to further the political or social objectives of the environmentalists | Synonyms: eco-warfare, ecological terrorism, ecological warfare |
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| ecotourism | (noun) tourism to exotic or threatened ecosystems to observe wildlife or to help preserve nature | - |
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| ecphonesis | (noun) an exclamatory rhetorical device | Synonyms: exclamation |
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| ecrevisse | (noun) small crayfish of Europe and Asia and western North America | Synonyms: Old World crayfish |
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| (noun) tiny lobster-like crustaceans usually boiled briefly | Synonyms: crawdad, crawfish, crayfish |
| ecru | (noun) a very light brown | Synonyms: beige |
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| ecstasy | (noun) street names for methylenedioxymethamphetamine | Synonyms: Adam, cristal, disco biscuit, go, hug drug, X, XTC |
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| (noun) a state of being carried away by overwhelming emotion | Synonyms: exaltation, rapture, raptus, transport |
| (noun) a state of elated bliss | Synonyms: rapture |
| 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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| ecumenicalism | (noun) (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | Synonyms: ecumenicism, ecumenism |
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| ecumenicism | (noun) (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | Synonyms: ecumenicalism, ecumenism |
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| ecumenism | (noun) (Christianity) the doctrine of the ecumenical movement that promotes cooperation and better understanding among different religious denominations: aimed at universal Christian unity | Synonyms: ecumenicalism, ecumenicism |
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| (noun) a movement promoting union between religions (especially between Christian churches) | Synonyms: oecumenism |
| eczema | (noun) generic term for inflammatory conditions of the skin; particularly with vesiculation in the acute stages | - |
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| 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 |
| elecampane | (noun) tall coarse Eurasian herb having daisylike yellow flowers with narrow petals whose rhizomatous roots are used medicinally | Synonyms: Inula helenium |
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| 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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| electrocardiography | (noun) diagnostic procedure consisting of recording the activity of the heart electronically with a cardiograph (and producing a cardiogram) | Synonyms: cardiography |
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| electrocautery | (noun) application of a needle heated by an electric current to destroy tissue (as to remove warts) | - |
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| electrochemistry | (noun) branch of chemistry that deals with the chemical action of electricity and the production of electricity by chemical reactions | - |
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| electrocution | (noun) killing by electric shock | - |
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| (noun) execution by electricity | Synonyms: burning |
| electrocutioner | (noun) an executioner who uses electricity to kill the condemned person | - |
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| electrode | (noun) a conductor used to make electrical contact with some part of a circuit | - |
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| electrodeposition | (noun) the deposition of a substance on an electrode by the action of electricity (especially by electrolysis) | - |
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| electrodynamometer | (noun) measuring instrument that uses the interaction of the magnetic fields of two coils to measure current or voltage or power | - |
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| electroencephalogram | (noun) a graphical record of electrical activity of the brain; produced by an electroencephalograph | Synonyms: EEG, encephalogram |
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| electroencephalograph | (noun) medical instrument that records electric currents generated by the brain | - |
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| electrograph | (noun) electrical device used for etching by electrolytic means | - |
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| (noun) an apparatus for the electrical transmission of pictures | - |
| electrolocation | (noun) The use of electroreception to locate surrounding objects. | - |
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| electrologist | (noun) someone skilled in the use of electricity to remove moles or warts or hair roots | - |
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| electrolysis | (noun) removing superfluous or unwanted hair by passing an electric current through the hair root | - |
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| (noun) (chemistry) a chemical decomposition reaction produced by passing an electric current through a solution containing ions | - |
| electrolyte | (noun) a solution that conducts electricity | - |
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| electrolytic | (noun) a fixed capacitor consisting of two electrodes separated by an electrolyte | Synonyms: electrolytic capacitor, electrolytic condenser |
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| electromagnet | (noun) a temporary magnet made by coiling wire around an iron core; when current flows in the coil the iron becomes a magnet | - |
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| electromagnetics | (noun) the branch of physics concerned with electromagnetic phenomena | Synonyms: electromagnetism |
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| electromagnetism | (noun) the branch of physics concerned with electromagnetic phenomena | Synonyms: electromagnetics |
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| (noun) magnetism produced by an electric current | - |
| electrometer | (noun) meter to measure electrostatic voltage differences; draws no current from the source | - |
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| electromyogram | (noun) a graphical record of electric currents associated with muscle contractions | Synonyms: EMG |
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| electromyograph | (noun) a medical instrument that records the electrical waves associated with the activity of skeletal muscles | - |
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| electromyography | (noun) diagnosis of neuromuscular disorders with the use of an electromyograph | - |
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| electron | (noun) an elementary particle with negative charge | Synonyms: negatron |
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| electronegativity | (noun) (chemistry) the tendency of an atom or radical to attract electrons in the formation of an ionic bond | Synonyms: negativity |
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| electronics | (noun) the branch of physics that deals with the emission and effects of electrons and with the use of electronic devices | - |
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| electrophoresis | (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, dielectrolysis, ionophoresis |
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| electrophorus | (noun) a simple electrostatic generator that generates repeated charges of static electricity | - |
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| electroplate | (noun) any artifact that has been plated with a thin coat of metal by electrolysis | - |
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| electroplater | (noun) a plater who uses electrolysis | - |
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| electroretinogram | (noun) a graphical recording of the electrical activity of the retina that results when light is flashed into the eye | - |
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| electroscope | (noun) measuring instrument that detects electric charge; two gold leaves diverge owing to repulsion of charges with like sign | - |
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| electroshock | (noun) the administration of a strong electric current that passes through the brain to induce convulsions and coma | Synonyms: ECT, electroconvulsive therapy, electroshock therapy |
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| electrosleep | (noun) unconsciousness brought about by the passage of a low voltage electric current through the brain | - |
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| electrostatics | (noun) the branch of physics that deals with static electricity | - |
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| electrosurgery | (noun) surgery performed with electrical devices (as in electrocautery) | - |
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| electrotherapist | (noun) someone who specializes in the treatment of disease by electricity | - |
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| electrotherapy | (noun) the therapeutic application of electricity to the body (as in the treatment of various forms of paralysis) | Synonyms: electric healing, electrical healing, galvanism |
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| electrum | (noun) an alloy of gold and silver | - |
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