| dideoxycytosine | (noun) an antiviral drug used to combat HIV infection; a nucleoside analog reverse transcriptase inhibitor (NARTI) | Synonyms: ddC, DDC, zalcitabine |
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| dideoxyinosine | (noun) an antiviral drug used to combat HIV infection, a reverse transcriptase inhibitor | Synonyms: ddI, DDI, didanosine |
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| digitoxin | (noun) digitalis preparation used to treat congestive heart failure or cardiac arrhythmia | - |
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| digoxin | (noun) digitalis preparation (trade name Lanoxin) used to treat congestive heart failure or cardiac arrhythmia; helps the heart beat more forcefully | Synonyms: Lanoxin |
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| dihydroxyphenylalanine | (noun) amino acid that is formed in the liver and converted into dopamine in the brain | Synonyms: dopa |
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| dimethylglyoxime | (noun) a compound used in analysis as a precipitant for palladium or nickel | - |
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| dioxide | (noun) an oxide containing two atoms of oxygen in the molecule | - |
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| dioxin | (noun) any of several toxic or carcinogenic hydrocarbons that occur as impurities in herbicides | - |
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| dixie | (noun) a large metal pot (12 gallon camp kettle) for cooking; used in military camps | - |
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| dominatrix | (noun) a dominating woman (especially one who plays that role in a sadomasochistic sexual relationship) | - |
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| dorsiflexion | (noun) the act of bending backward (of the body or a body part) | - |
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| doxazosin | (noun) an antihypertensive drug (trade name Cardura) that works by relaxing blood vessels so that blood passes through them more easily; it is also used to treat benign prostatic hyperplasia | Synonyms: Cardura |
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| doxepin | (noun) a tricyclic antidepressant (trade names Adapin and Sinequan) with numerous side effects (dry mouth and sedation and gastrointestinal disturbances) | Synonyms: Adapin, doxepin hydrochloride, Sinequan |
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| doxing | (noun) Releasing someone's personal information on the Web with the intention of causing harassment | - |
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| doxology | (noun) a hymn or verse in Christian liturgy glorifying God | - |
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| doxorubicin | (noun) an antibiotic used as an anticancer drug | - |
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| doxy | (noun) a woman who cohabits with an important man | Synonyms: concubine, courtesan, paramour |
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| doxycycline | (noun) an antibiotic derived from tetracycline that is effective against many infections | Synonyms: Vibramycin |
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| duplex | (noun) an apartment having rooms on two floors that are connected by a staircase | Synonyms: duplex apartment |
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| (noun) a house with two units sharing a common wall | Synonyms: duplex house, semidetached house |
| dyslexia | (noun) impaired ability to learn to read | - |
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| dyslexic | (noun) a person who has dyslexia | Synonyms: dyslectic |
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| earwax | (noun) a soft yellow wax secreted by glands in the ear canal | Synonyms: cerumen |
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| efflux | (noun) the process of flowing out | Synonyms: effluence, outflow |
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| elixir | (noun) a substance believed to cure all ills | - |
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| (noun) a sweet flavored liquid (usually containing a small amount of alcohol) used in compounding medicines to be taken by mouth in order to mask an unpleasant taste | - |
| (noun) hypothetical substance that the alchemists believed to be capable of changing base metals into gold | Synonyms: philosopher's stone, philosophers' stone |
| endotoxin | (noun) a toxin that is confined inside the microorganisms and is released only when the microorganisms are broken down or die | - |
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| enterotoxemia | (noun) a disease of cattle and sheep that is attributed to toxins absorbed from the intestines | - |
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| enterotoxin | (noun) a cytotoxin specific for the cells of the intestinal mucosa | - |
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| epicalyx | (noun) a group of bracts simulating a calyx as in a carnation or hibiscus | Synonyms: calycle, calyculus, false calyx |
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| epiplexis | (noun) a rhetorical device in which the speaker reproaches the audience in order to incite or convince them | - |
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| epistaxis | (noun) bleeding from the nose | Synonyms: nosebleed |
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| epitaxy | (noun) growing a crystal layer of one mineral on the crystal base of another mineral in such a manner that its crystalline orientation is the same as that of the substrate | - |
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| epixylon | (noun) organisms that are attached to submerged wood surfaces in aquatic ecosystems. | - |
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| epoxy | (noun) a thermosetting resin; used chiefly in strong adhesives and coatings and laminates | Synonyms: epoxy glue, epoxy resin |
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| equinox | (noun) (astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic | Synonyms: equinoctial point |
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| (noun) either of two times of the year when the sun crosses the plane of the earth's equator and day and night are of equal length | - |
| ethosuximide | (noun) an anticonvulsant drug (trade names Emeside and Zarontin) used to treat petit mal epilepsy | Synonyms: Emeside, Zarontin |
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| ethoxyethane | (noun) a colorless volatile highly flammable liquid formerly used as an inhalation anesthetic | Synonyms: diethyl ether, divinyl ether, ether, ethyl ether, vinyl ether |
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| ex | (noun) the 24th letter of the Roman alphabet | Synonyms: X, x |
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| (noun) a woman who was formerly a particular man's wife | Synonyms: ex-wife |
| (noun) a man who was formerly a certain woman's husband | Synonyms: ex-husband |
| exabit | (noun) a unit of information equal to 1000 petabits or 10^18 bits | Synonyms: Eb, Ebit |
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| exabyte | (noun) a unit of information equal to 1024 pebibytes or 2^60 bytes | Synonyms: EB, EiB, exbibyte |
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| (noun) a unit of information equal to 1000 petabytes or 10^18 bytes | Synonyms: EB |
| exacerbation | (noun) violent and bitter exasperation | - |
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| (noun) action that makes a problem or a disease (or its symptoms) worse | Synonyms: aggravation |
| 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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| exaflop | (noun) (computer science) a unit for measuring the speed of a computer system, equal to one quintillion floating-point operations a second. | Synonyms: EFLOPS |
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| exaggeration | (noun) the act of making something more noticeable than usual | - |
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| (noun) making to seem more important than it really is | Synonyms: magnification, overstatement |
| (noun) extravagant exaggeration | Synonyms: hyperbole |
| exaltation | (noun) the elevation of a person (as to the status of a god) | Synonyms: apotheosis, deification |
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| (noun) a flock of larks (especially a flock of larks in flight overhead) | - |
| (noun) the location of a planet in the zodiac at which it is believed to exert its maximum influence | - |
| (noun) a state of being carried away by overwhelming emotion | Synonyms: ecstasy, rapture, raptus, transport |
| exaltolide | (noun) the macrocyclic lactone having fifteen carbon atoms; it has a musky scent, similar to exaltone. | - |
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| exam | (noun) a set of questions or exercises evaluating skill or knowledge | Synonyms: examination, test |
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| examen | (noun) a detailed inspection of your conscience (as done daily by Jesuits) | Synonyms: examination |
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| (noun) a critical study (as of a writer's work) | - |
| examination | (noun) the act of examining something closely (as for mistakes) | Synonyms: scrutiny |
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| (noun) the act of giving students or candidates a test (as by questions) to determine what they know or have learned | Synonyms: testing |
| (noun) a detailed inspection of your conscience (as done daily by Jesuits) | Synonyms: examen |
| (noun) a set of questions or exercises evaluating skill or knowledge | Synonyms: exam, test |
| (noun) formal systematic questioning | Synonyms: interrogation, interrogatory |
| examinee | (noun) someone who is tested (as by an intelligence test or an academic examination) | Synonyms: testee |
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| examiner | (noun) an investigator who observes carefully | Synonyms: inspector |
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| (noun) someone who administers a test to determine your qualifications | Synonyms: quizzer, tester |
| example | (noun) a task performed or problem solved in order to develop skill or understanding | Synonyms: exercise |
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| (noun) an item of information that is typical of a class or group | Synonyms: illustration, instance, representative |
| (noun) something to be imitated | Synonyms: exemplar, good example, model |
| (noun) a representative form or pattern | Synonyms: model |
| (noun) punishment intended as a warning to others | Synonyms: deterrent example, lesson, object lesson |
| (noun) an occurrence of something | Synonyms: case, instance |
| exanthem | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthema, skin eruption |
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| exanthema | (noun) eruption on the skin occurring as a symptom of a disease | Synonyms: exanthem, skin eruption |
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| exarch | (noun) a viceroy who governed a large province in the Roman Empire | - |
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| (noun) a bishop in eastern Christendom who holds a place below a patriarch but above a metropolitan | - |
| (noun) a bishop in one of several Eastern Orthodox Churches in North America | - |
| exarchate | (noun) a diocese of the Eastern Orthodox Church | Synonyms: eparchy |
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| exasperation | (noun) actions that cause great irritation (or even anger) | - |
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| (noun) an exasperated feeling of annoyance | Synonyms: aggravation |
| exbibit | (noun) a unit of information equal to 1024 pebibits or 2^60 bits | Synonyms: Eibit |
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| exbibyte | (noun) a unit of information equal to 1024 pebibytes or 2^60 bytes | Synonyms: EB, EiB, exabyte |
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| excavation | (noun) the act of extracting ores or coal etc from the earth | Synonyms: mining |
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| (noun) the act of digging | Synonyms: dig, digging |
| (noun) a hole in the ground made by excavating | - |
| (noun) the site of an archeological exploration | Synonyms: archeological site, dig |
| excavator | (noun) a machine for excavating | Synonyms: digger, power shovel, shovel |
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| (noun) a workman who excavates for foundations of buildings or for quarrying | - |
| exceedance | (noun) (geology) the probability that an earthquake will generate a level of ground motion that exceeds a specified reference level during a given exposure time | - |
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| excellence | (noun) the quality of excelling; possessing good qualities in high degree | - |
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| (noun) an outstanding feature; something in which something or someone excels | Synonyms: excellency |
| excellency | (noun) an outstanding feature; something in which something or someone excels | Synonyms: excellence |
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| excelsior | (noun) thin curly wood shavings used for packing or stuffing | Synonyms: wood shavings |
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| exception | (noun) a deliberate act of omission | Synonyms: elision, exclusion |
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| (noun) an instance that does not conform to a rule or generalization | - |
| (noun) grounds for adverse criticism | - |
| excerpt | (noun) a passage selected from a larger work | Synonyms: excerption, extract, selection |
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| excerption | (noun) The act of excerpting or selecting from a larger work. | - |
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| (noun) a passage selected from a larger work | Synonyms: excerpt, extract, selection |
| excess | (noun) excessive indulgence | Synonyms: overindulgence |
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| (noun) immoderation as a consequence of going beyond sufficient or permitted limits | Synonyms: excessiveness, inordinateness |
| (noun) a quantity much larger than is needed | Synonyms: nimiety, surplus, surplusage |
| (noun) the state of being more than full | Synonyms: overabundance, surfeit |
| excessiveness | (noun) immoderation as a consequence of going beyond sufficient or permitted limits | Synonyms: excess, inordinateness |
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| exchange | (noun) reciprocal transfer of equivalent sums of money (especially the currencies of different countries) | Synonyms: interchange |
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| (noun) the act of putting one thing or person in the place of another: | Synonyms: commutation, substitution |
| (noun) the act of changing one thing for another thing | Synonyms: interchange |
| (noun) the act of giving something in return for something received | - |
| (noun) (chess) the capture by both players (usually on consecutive moves) of pieces of equal value | - |
| (noun) (chess) gaining (or losing) a rook in return for a knight or bishop | - |
| (noun) (sports) an unbroken sequence of several successive strokes | Synonyms: rally |
| (noun) a workplace for buying and selling; open only to members | - |
| (noun) a workplace that serves as a telecommunications facility where lines from telephones can be connected together to permit communication | Synonyms: central, telephone exchange |
| (noun) a mutual expression of views (especially an unpleasant one) | - |
| (noun) chemical process in which one atom or ion or group changes places with another | - |
| exchangeability | (noun) the quality of being capable of exchange or interchange | Synonyms: fungibility, interchangeability, interchangeableness |
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| exchanger | (noun) one whose business is to exchange the money of one country for that of another country | Synonyms: money changer |
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| exchequer | (noun) the funds of a government or institution or individual | Synonyms: treasury |
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| excise | (noun) a tax that is measured by the amount of business done (not on property or income from real estate) | Synonyms: excise tax |
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| exciseman | (noun) someone who collects taxes for the government | Synonyms: collector of internal revenue, internal revenue agent, tax collector, taxman |
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| excision | (noun) surgical removal of a body part or tissue | Synonyms: ablation, cutting out, extirpation |
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| (noun) the act of pulling up or out; uprooting; cutting off from existence | Synonyms: deracination, extirpation |
| (noun) the act of banishing a member of a church from the communion of believers and the privileges of the church; cutting a person off from a religious society | Synonyms: excommunication |
| (noun) the omission that is made when an editorial change shortens a written passage | Synonyms: cut, deletion |
| excitability | (noun) being easily excited | Synonyms: excitableness, volatility |
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| (noun) excessive sensitivity of an organ or body part | Synonyms: irritability |
| excitableness | (noun) being easily excited | Synonyms: excitability, volatility |
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| excitant | (noun) a drug that temporarily quickens some vital process | Synonyms: stimulant, stimulant drug |
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| excitation | (noun) something that agitates and arouses | Synonyms: excitement |
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| (noun) the neural or electrical arousal of an organ or muscle or gland | Synonyms: innervation, irritation |
| (noun) the state of being emotionally aroused and worked up | Synonyms: excitement, fervor, fervour, inflammation |
| excitement | (noun) something that agitates and arouses | Synonyms: excitation |
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| (noun) disturbance usually in protest | Synonyms: agitation, hullabaloo, turmoil, upheaval |
| (noun) the feeling of lively and cheerful joy | Synonyms: exhilaration |
| (noun) the state of being emotionally aroused and worked up | Synonyms: excitation, fervor, fervour, inflammation |
| excitotoxin | (noun) any of a group of neurologically active compounds, such as glutamate and aspartame, that have detrimental excitatory effects on the central nervous system when taken in high concentrations. | - |
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| exclaiming | (noun) an abrupt excited utterance | Synonyms: exclamation |
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| exclamation | (noun) an abrupt excited utterance | Synonyms: exclaiming |
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| (noun) an exclamatory rhetorical device | Synonyms: ecphonesis |
| (noun) a loud complaint or protest or reproach | - |
| exclusion | (noun) the act of forcing out someone or something | Synonyms: ejection, expulsion, riddance |
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| (noun) a deliberate act of omission | Synonyms: elision, exception |
| (noun) the state of being excluded | - |
| (noun) the state of being excommunicated | Synonyms: censure, excommunication |
| exclusive | (noun) a news report that is reported first by one news organization | Synonyms: scoop |
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| exclusiveness | (noun) tendency to associate with only a select group | Synonyms: clannishness, cliquishness |
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| excogitation | (noun) thinking something out with care in order to achieve complete understanding of it | - |
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| (noun) the creation of something in the mind | Synonyms: conception, design, innovation, invention |
| excogitator | (noun) a thinker who considers carefully and thoroughly | - |
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| excommunication | (noun) the act of banishing a member of a church from the communion of believers and the privileges of the church; cutting a person off from a religious society | Synonyms: excision |
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| (noun) the state of being excommunicated | Synonyms: censure, exclusion |
| excoriation | (noun) severe censure | - |
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| (noun) an abraded area where the skin is torn or worn off | Synonyms: abrasion, scrape, scratch |
| excrement | (noun) waste matter (as urine or sweat but especially feces) discharged from the body | Synonyms: body waste, excreta, excretion, excretory product |
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| excrescence | (noun) (pathology) an abnormal outgrowth or enlargement of some part of the body | - |
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| (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, extrusion, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling |
| excreta | (noun) waste matter (as urine or sweat but especially feces) discharged from the body | Synonyms: body waste, excrement, excretion, excretory product |
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| excreting | (noun) the bodily process of discharging waste matter | Synonyms: elimination, evacuation, excretion, voiding |
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| excretion | (noun) the bodily process of discharging waste matter | Synonyms: elimination, evacuation, excreting, voiding |
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| (noun) waste matter (as urine or sweat but especially feces) discharged from the body | Synonyms: body waste, excrement, excreta, excretory product |