| 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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| embolectomy | (noun) surgical removal of an embolus (usually from an artery) | - |
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| emunctorium | (noun) a white linen cloth which is used to wipe the chalice after each communicant partakes. | Synonyms: purificator, purificatorium |
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| enactment | (noun) acting the part of a character on stage; dramatically representing the character by speech and action and gesture | Synonyms: characterization, personation, portrayal |
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| (noun) the passing of a law by a legislative body | Synonyms: passage |
| (noun) a legal document codifying the result of deliberations of a committee or society or legislative body | Synonyms: act |
| endarterectomy | (noun) surgical removal of the inner lining of an artery that is clogged with atherosclerosis | - |
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| enterobacteria | (noun) rod-shaped Gram-negative bacteria; most occur normally or pathogenically in intestines of humans and other animals | Synonyms: enteric bacteria, enterics, entric |
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| entoproct | (noun) any of various moss-like aquatic animals usually forming branching colonies; each polyp having a both mouth and anus within a closed ring of tentacles | - |
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| equinoctial | (noun) the great circle on the celestial sphere midway between the celestial poles | Synonyms: celestial equator, equinoctial circle, equinoctial line |
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| erecting | (noun) the act of building or putting up | Synonyms: erection |
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| erection | (noun) the act of building or putting up | Synonyms: erecting |
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| (noun) a structure that has been erected | - |
| (noun) an erect penis | Synonyms: hard-on |
| erectness | (noun) the property of being upright in posture | Synonyms: uprightness |
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| (noun) position at right angles to the horizon | Synonyms: uprightness, verticality, verticalness |
| eructation | (noun) a reflex that expels gas noisily from the stomach through the mouth | Synonyms: belch, belching, burp, burping |
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| (noun) (of volcanoes) pouring out fumes or lava (or a deposit so formed) | Synonyms: eruption, extravasation |
| eubacteria | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacterium, true bacteria |
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| eubacterium | (noun) a large group of bacteria having rigid cell walls; motile types have flagella | Synonyms: eubacteria, true bacteria |
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| eutectic | (noun) a mixture of substances having a minimum melting point | - |
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| eviction | (noun) the expulsion of someone (such as a tenant) from the possession of land by process of law | Synonyms: dispossession, legal ouster |
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| (noun) action by a landlord that compels a tenant to leave the premises (as by rendering the premises unfit for occupancy); no physical expulsion or legal process is involved | Synonyms: constructive eviction |
| exacta | (noun) a bet that you can pick the first and second finishers in the right order | Synonyms: perfecta |
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| exactingness | (noun) the quality or state of being demanding or unyielding. | - |
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| exaction | (noun) act of demanding or levying by force or authority | - |
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| exactitude | (noun) the quality of being exact | Synonyms: exactness |
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| exactness | (noun) the quality of being exact | Synonyms: exactitude |
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| expectancy | (noun) something expected (as on the basis of a norm) | Synonyms: anticipation |
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| (noun) an expectation | Synonyms: anticipation |
| expectation | (noun) belief about (or mental picture of) the future | Synonyms: outlook, prospect |
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| (noun) the sum of the values of a random variable divided by the number of values | Synonyms: arithmetic mean, expected value, first moment |
| (noun) the feeling that something is about to happen | - |
| (noun) anticipating with confidence of fulfillment | Synonyms: anticipation |
| expectedness | (noun) ordinariness as a consequence of being expected and not surprising | - |
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| (noun) the state of being that is commonly observed | Synonyms: commonness |
| expectorant | (noun) a medicine promoting expectoration | Synonyms: expectorator |
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| expectoration | (noun) the act of spitting (forcefully expelling saliva) | Synonyms: spit, spitting |
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| (noun) the process of coughing up and spitting out | - |
| expectorator | (noun) a medicine promoting expectoration | Synonyms: expectorant |
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| (noun) a person who spits (ejects saliva or phlegm from the mouth) | Synonyms: spitter |
| expunction | (noun) deletion by an act of expunging or erasing | Synonyms: erasure, expunging |
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| extinction | (noun) the act of extinguishing; causing to stop burning | Synonyms: extinguishing, quenching |
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| (noun) a conditioning process in which the reinforcer is removed and a conditioned response becomes independent of the conditioned stimulus | Synonyms: experimental extinction |
| (noun) complete annihilation | Synonyms: extermination |
| (noun) the reduction of the intensity of radiation as a consequence of absorption and radiation | - |
| (noun) no longer in existence | Synonyms: defunctness |
| (noun) no longer active; extinguished | - |
| extract | (noun) a passage selected from a larger work | Synonyms: excerpt, excerption, selection |
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| (noun) a solution obtained by steeping or soaking a substance (usually in water) | Synonyms: infusion |
| extractant | (noun) an immiscible liquid used to extract a substance from another liquid. | - |
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| extraction | (noun) the action of taking out something (especially using effort or force) | - |
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| (noun) properties attributable to your ancestry | Synonyms: descent, origin |
| (noun) the process of obtaining something from a mixture or compound by chemical or physical or mechanical means | - |
| extractivity | (noun) the amount of extract that grains of malt yield. | - |
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| extractor | (noun) an instrument for extracting tight-fitting components | - |
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| (noun) an apparatus that uses centrifugal force to separate particles from a suspension | Synonyms: centrifuge, separator |
| (noun) a mechanism in a firearm that pulls an empty shell case out of the chamber and passes it to the ejector | Synonyms: cartridge extractor, cartridge remover |
| extrospection | (noun) examination or observation of what is outside oneself, as opposed to introspection. | - |
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| fact | (noun) a piece of information about circumstances that exist or events that have occurred | - |
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| (noun) a concept whose truth can be proved | - |
| (noun) a statement or assertion of verified information about something that is the case or has happened | - |
| (noun) an event known to have happened or something known to have existed | - |
| faction | (noun) a dissenting clique | Synonyms: sect |
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| (noun) a clique (often secret) that seeks power usually through intrigue | Synonyms: cabal, camarilla, junto |
| factoid | (noun) a brief (usually one sentence and usually trivial) news item | - |
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| (noun) something resembling a fact; unverified (often invented) information that is given credibility because it appeared in print | - |
| factor | (noun) (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity | Synonyms: cistron, gene |
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| (noun) an abstract part of something | Synonyms: component, constituent, element, ingredient |
| (noun) an independent variable in statistics | - |
| (noun) anything that contributes causally to a result | - |
| (noun) a businessman who buys or sells for another in exchange for a commission | Synonyms: agent, broker |
| (noun) one of two or more integers that can be exactly divided into another integer | Synonyms: divisor |
| (noun) any of the numbers (or symbols) that form a product when multiplied together | - |
| factorial | (noun) the product of all the integers up to and including a given integer | - |
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| factoring | (noun) (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression | Synonyms: factorisation, factorization |
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| factorisation | (noun) (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression | Synonyms: factoring, factorization |
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| factorization | (noun) (mathematics) the resolution of an expression into factors such that when multiplied together they give the original expression | Synonyms: factoring, factorisation |
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| factory | (noun) a plant consisting of one or more buildings with facilities for manufacturing | Synonyms: manufactory, manufacturing plant, mill |
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| factotum | (noun) a servant employed to do a variety of jobs | - |
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| factuality | (noun) the quality of being actual or based on fact | Synonyms: factualness |
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| factualness | (noun) the quality of being actual or based on fact | Synonyms: factuality |
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| fiction | (noun) a literary work based on the imagination and not necessarily on fact | - |
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| (noun) a deliberately false or improbable account | Synonyms: fable, fabrication |
| fictionalisation | (noun) writing in a fictional form | Synonyms: fabrication, fictionalization |
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| (noun) a literary work based partly or wholly on fact but written as if it were fiction | Synonyms: fictionalization |
| fictionalization | (noun) writing in a fictional form | Synonyms: fabrication, fictionalisation |
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| (noun) a literary work based partly or wholly on fact but written as if it were fiction | Synonyms: fictionalisation |
| flection | (noun) deviation from a straight or normal course | Synonyms: flexion, inflection |
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| (noun) the state of being flexed (as of a joint) | Synonyms: flexion, flexure |
| fluctuation | (noun) the quality of being unsteady and subject to changes | Synonyms: wavering |
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| (noun) an instance of change; the rate or magnitude of change | Synonyms: variation |
| (noun) a wave motion | - |
| fractal | (noun) (mathematics) a geometric pattern that is repeated at every scale and so cannot be represented by classical geometry | - |
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| fraction | (noun) a small part or item forming a piece of a whole | - |
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| (noun) the quotient of two rational numbers | - |
| (noun) a component of a mixture that has been separated by a fractional process | - |
| fractionation | (noun) separation into portions | - |
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| (noun) a process that uses heat to separate a substance into its components | Synonyms: fractional process |
| fractiousness | (noun) the trait of being prone to disobedience and lack of discipline | Synonyms: unruliness, wilfulness, willfulness |
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| fracture | (noun) the act of cracking something | Synonyms: crack, cracking |
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| (noun) (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other | Synonyms: break, fault, faulting, geological fault, shift |
| (noun) breaking of hard tissue such as bone | Synonyms: break |
| friction | (noun) effort expended in moving one object over another with pressure | Synonyms: detrition, rubbing |
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| (noun) the resistance encountered when one body is moved in contact with another | Synonyms: rubbing |
| (noun) a state of conflict between persons | Synonyms: clash |
| fructification | (noun) organs of fruiting (especially the reproductive parts of ferns and mosses) | - |
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| (noun) the bearing of fruit | - |
| fructose | (noun) a simple sugar found in honey and in many ripe fruits | Synonyms: fruit sugar, laevulose, levulose |
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| fructosuria | (noun) the presence of levulose is the urine | - |
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| function | (noun) the actions and activities assigned to or required or expected of a person or group | Synonyms: office, part, role |
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| (noun) what something is used for | Synonyms: purpose, role, use |
| (noun) a set sequence of steps, part of larger computer program | Synonyms: procedure, routine, subprogram, subroutine |
| (noun) a formal or official social gathering or ceremony of people | Synonyms: affair, occasion, social affair, social function, social gathering, social occasion |
| (noun) a formal or official social gathering or ceremony | - |
| (noun) (mathematics) a mathematical relation such that each element of a given set (the domain of the function) is associated with an element of another set (the range of the function) | Synonyms: map, mapping, mathematical function, single-valued function |
| (noun) a relation such that one thing is dependent on another | - |