| dextrose | (noun) an isomer of glucose that is found in honey and sweet fruits | Synonyms: dextroglucose, grape sugar |
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| dextrous | (adjective) skillful in physical movements; especially of the hands | Synonyms: deft, dexterous |
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| dextrously | (adverb) with dexterity; in a dexterous manner | Synonyms: deftly, dexterously |
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| diazoxide | (noun) vasodilator (trade name Hyperstat) used to treat severe hypertension | Synonyms: Hyperstat |
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| dicarboxylic | (adjective) containing two carboxyls per molecule | - |
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| dicloxacillin | (noun) antibacterial (trade name Dynapen) used to treat staphylococcal infections that are resistant to penicillin | Synonyms: Dynapen |
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| 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 | (adjective) allowing communication in opposite directions simultaneously | - |
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| (adjective) (used technically of a device or process) having two parts | - |
| (noun) an apartment having rooms on two floors that are connected by a staircase | Synonyms: duplex apartment |
| (noun) a house with two units sharing a common wall | Synonyms: duplex house, semidetached house |
| (verb) change into a duplex | - |
| dyslexia | (noun) impaired ability to learn to read | - |
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| dyslexic | (adjective) of or relating to or symptomatic of dyslexia | - |
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| (adjective) having impaired ability to comprehend written words usually associated with a neurologic disorder | Synonyms: dyslectic |
| (noun) a person who has dyslexia | Synonyms: dyslectic |
| 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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| (verb) glue with epoxy | - |
| 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 | (adjective) out of fashion | Synonyms: antique, demode, old-fashioned, old-hat, outmoded, passe, passee |
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| (noun) the 24th letter of the Roman alphabet | Synonyms: X, x |
| (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 |
| exacerbate | (verb) make worse | Synonyms: aggravate, exasperate, worsen |
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| (verb) exasperate or irritate | Synonyms: aggravate, exasperate |
| exacerbating | (adjective) making worse | Synonyms: aggravating, exasperating |
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| 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 |
| exact | (adjective) marked by strict and particular and complete accordance with fact | - |
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| (adjective) (of ideas, images, representations, expressions) characterized by perfect conformity to fact or truth; strictly correct | Synonyms: accurate, precise |
| (adjective) lacking compromising or mitigating elements | Synonyms: direct |
| (verb) claim as due or just | Synonyms: demand |
| (verb) take as an undesirable consequence of some event or state of affairs | Synonyms: claim, take |
| exacta | (noun) a bet that you can pick the first and second finishers in the right order | Synonyms: perfecta |
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| exacting | (adjective) having complicated nutritional requirements; especially growing only in special artificial cultures | Synonyms: fastidious |
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| (adjective) requiring precise accuracy | Synonyms: exigent |
| (adjective) severe and unremitting in making demands | Synonyms: stern, strict |
| 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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| exactly | (adverb) indicating exactness or preciseness | Synonyms: just, precisely, properly |
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| (adverb) in a precise manner | Synonyms: incisively, precisely |
| (adverb) just as it should be | Synonyms: on the button, on the dot, on the nose, precisely |
| 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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| exaggerate | (verb) to enlarge beyond bounds or the truth | Synonyms: amplify, hyperbolise, hyperbolize, magnify, overdraw, overstate |
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| (verb) do something to an excessive degree | Synonyms: overdo |
| exaggerated | (adjective) represented as greater than is true or reasonable | Synonyms: overdone, overstated |
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| (adjective) enlarged to an abnormal degree | Synonyms: enlarged, magnified |
| exaggeratedly | (adverb) in an exaggerated manner | Synonyms: hyperbolically |
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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 |
| exalt | (verb) raise in rank, character, or status | - |
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| (verb) praise, glorify, or honor | Synonyms: extol, glorify, laud, proclaim |
| (verb) heighten or intensify | Synonyms: animate, enliven, inspire, invigorate |
| (verb) fill with sublime emotion | Synonyms: beatify, exhilarate, inebriate, thrill, tickle pink |
| 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 |
| exalted | (adjective) of high moral or intellectual value; elevated in nature or style | Synonyms: elevated, grand, high-flown, high-minded, idealistic, lofty, noble-minded, rarefied, rarified, sublime |
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| exalting | (adjective) tending to exalt | Synonyms: ennobling |
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| 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 |
| examine | (verb) consider in detail and subject to an analysis in order to discover essential features or meaning | Synonyms: analyse, analyze, canvass, study |
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| (verb) question closely | - |
| (verb) question or examine thoroughly and closely | Synonyms: probe |
| (verb) observe, check out, and look over carefully or inspect | Synonyms: see |
| (verb) put to the test, as for its quality, or give experimental use to | Synonyms: essay, prove, test, try, try out |
| 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 |
| exanimate | (adjective) deprived of life; no longer living | Synonyms: lifeless |
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| 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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| exasperate | (verb) make worse | Synonyms: aggravate, exacerbate, worsen |
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| (verb) exasperate or irritate | Synonyms: aggravate, exacerbate |
| (verb) make furious | Synonyms: incense, infuriate |
| exasperated | (adjective) greatly annoyed; out of patience | Synonyms: browned off, cheesed off |
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| exasperating | (adjective) extremely annoying or displeasing | Synonyms: infuriating, maddening, vexing |
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| (adjective) making worse | Synonyms: aggravating, exacerbating |
| exasperatingly | (adverb) in an exasperating manner | - |
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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 |
| exaugural | (adjective) occurring at or marking the close of a term of office | - |
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| 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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| excavate | (verb) find by digging in the ground | Synonyms: dig up, turn up |
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| (verb) remove the inner part or the core of | Synonyms: dig, hollow |
| (verb) form by hollowing | - |
| (verb) recover through digging | Synonyms: unearth |
| 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 | - |
| exceed | (verb) be or do something to a greater degree | Synonyms: outdo, outgo, outmatch, outperform, outstrip, surmount, surpass |
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| (verb) be superior or better than some standard | Synonyms: go past, overstep, pass, top, transcend |
| (verb) be greater in scope or size than some standard | Synonyms: surpass, transcend |
| 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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| exceeding | (adjective) far beyond what is usual in magnitude or degree | Synonyms: exceptional, olympian, prodigious, surpassing |
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| exceedingly | (adverb) to an extreme degree | Synonyms: deathly, extremely, super |
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| excel | (verb) distinguish oneself | Synonyms: stand out, surpass |
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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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| excellent | (adjective) very good; of the highest quality | Synonyms: fantabulous, first-class, mean, ripping, splendid |
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| excellently | (adverb) wonderfully | Synonyms: famously, magnificently, splendidly |
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| excelsior | (noun) thin curly wood shavings used for packing or stuffing | Synonyms: wood shavings |
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| except | (verb) prevent from being included or considered or accepted | Synonyms: exclude, leave off, leave out, omit, take out |
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| (verb) object to | Synonyms: demur |