| embryonal | (adjective) of an organism prior to birth or hatching | Synonyms: embryologic, embryonic |
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| emotional | (adjective) of more than usual emotion | - |
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| (adjective) determined or actuated by emotion rather than reason | - |
| (adjective) of or pertaining to emotion | - |
| (adjective) (of persons) excessively affected by emotion | Synonyms: aroused, excited, worked up |
| empirical | (adjective) derived from experiment and observation rather than theory | Synonyms: empiric |
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| (adjective) relying on medical quackery | Synonyms: empiric |
| empyreal | (adjective) of or relating to the sky or heavens | Synonyms: empyrean |
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| (adjective) inspiring awe | Synonyms: empyrean, sublime |
| encyclical | (adjective) intended for wide distribution | - |
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| (noun) a letter from the pope sent to all Roman Catholic bishops throughout the world | Synonyms: encyclical letter |
| endemical | (adjective) of or relating to a disease (or anything resembling a disease) constantly present to greater or lesser extent in a particular locality | Synonyms: endemic |
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| endocrinal | (adjective) of or belonging to endocrine glands or their secretions | Synonyms: endocrine |
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| endometrial | (adjective) of or relating to the endometrium | - |
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| endothelial | (adjective) of or relating to or located in the endothelium | - |
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| endothermal | (adjective) (of a chemical reaction or compound) occurring or formed with absorption of heat | Synonyms: endothermic, heat-absorbing |
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| enigmatical | (adjective) not clear to the understanding | Synonyms: enigmatic, puzzling |
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| enteral | (adjective) of or relating to the enteron | Synonyms: enteric |
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| (adjective) of or relating to or inside the intestines | Synonyms: enteric, intestinal |
| enthral | (verb) hold spellbound | Synonyms: delight, enchant, enrapture, enthrall, ravish, transport |
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| entomological | (adjective) of or relating to the biological science of entomology | Synonyms: entomologic |
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| entrepreneurial | (adjective) of or relating to an entrepreneur | - |
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| (adjective) willing to take risks in order to make a profit | - |
| environmental | (adjective) concerned with the ecological effects of altering the environment | - |
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| (adjective) of or relating to the external conditions or surroundings | - |
| eparchial | (adjective) of or relating to an eparchy | - |
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| ephemeral | (adjective) lasting a very short time | Synonyms: fugacious, passing, short-lived, transient, transitory |
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| (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeron |
| epical | (adjective) constituting or having to do with or suggestive of a literary epic | Synonyms: epic |
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| epicarpal | (adjective) of or relating to the epicarp | - |
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| epicyclical | (adjective) of or relating to an epicycle | Synonyms: epicyclic |
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| epideictical | (adjective) designed primarily for rhetorical display | Synonyms: epideictic |
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| epidemiological | (adjective) of or relating to epidemiology | Synonyms: epidemiologic |
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| epidermal | (adjective) of or relating to a cuticle or cuticula | Synonyms: cuticular, dermal, epidermic |
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| epidural | (adjective) on or outside the dura mater | Synonyms: extradural |
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| (noun) regional anesthesia resulting from injection of an anesthetic into the epidural space of the spinal cord; sensation is lost in the abdominal and genital and pelvic areas; used in childbirth and gynecological surgery | Synonyms: epidural anaesthesia, epidural anesthesia |
| epiphyseal | (adjective) relating to the epiphysis of a bone | Synonyms: epiphysial |
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| epiphysial | (adjective) relating to the epiphysis of a bone | Synonyms: epiphyseal |
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| episcopal | (adjective) denoting or governed by or relating to a bishop or bishops | Synonyms: pontifical |
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| epistemological | (adjective) of or relating to epistemology | Synonyms: epistemic |
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| epithelial | (adjective) of or belonging to the epithelium | Synonyms: epithelioid |
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| epochal | (adjective) highly significant or important especially bringing about or marking the beginning of a new development or era | Synonyms: epoch-making |
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| equal | (adjective) having the same quantity, value, or measure as another | - |
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| (adjective) having the requisite qualities or resources to meet a task | Synonyms: adequate |
| (noun) a person who is of equal standing with another in a group | Synonyms: compeer, match, peer |
| (verb) make equal, uniform, corresponding, or matching | Synonyms: equalise, equalize, equate, match |
| (verb) be identical or equivalent to | Synonyms: be |
| (verb) be equal to in quality or ability | Synonyms: match, rival, touch |
| equatorial | (adjective) of or existing at or near the geographic equator | - |
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| (adjective) of or relating to conditions at the geographical equator | - |
| (adjective) of or relating to or at an equator | - |
| (noun) a telescope whose mounting has only two axes of motion, one parallel to the Earth's axis and the other one at right angles to it | - |
| equilateral | (adjective) having all sides or faces equal | - |
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| (noun) a figure whose sides are all equal | - |
| equinoctial | (adjective) relating to an equinox (when the lengths of night and day are equal) | - |
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| (adjective) relating to the vicinity of the equator | - |
| (noun) the great circle on the celestial sphere midway between the celestial poles | Synonyms: celestial equator, equinoctial circle, equinoctial line |
| equivocal | (adjective) open to two or more interpretations; or of uncertain nature or significance; or (often) intended to mislead | Synonyms: ambiguous |
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| (adjective) uncertain as a sign or indication | - |
| (adjective) open to question | - |
| eremitical | (adjective) of or relating to or befitting eremites or their practices of hermitic living | Synonyms: eremitic |
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| (adjective) characterized by ascetic solitude | Synonyms: anchoritic, eremitic, hermitic, hermitical |
| eristical | (adjective) given to disputation for its own sake and often employing specious arguments | Synonyms: eristic |
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| eschatological | (adjective) of or relating to or dealing with or regarding the ultimate destiny of mankind and the world | - |
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| esophageal | (adjective) relating to the esophagus | - |
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| especial | (adjective) surpassing what is common or usual or expected | Synonyms: exceptional, particular, special |
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| espial | (noun) the act of detecting something; catching sight of something | Synonyms: catching, detection, spotting, spying |
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| espousal | (noun) the act of accepting with approval; favorable reception | Synonyms: acceptance, acceptation, adoption |
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| (noun) archaic terms for a wedding or wedding feast | Synonyms: bridal |
| (noun) the act of becoming betrothed or engaged | Synonyms: betrothal |
| essential | (adjective) basic and fundamental | - |
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| (adjective) defining rights and duties as opposed to giving the rules by which rights and duties are established | Synonyms: substantive |
| (adjective) being or relating to or containing the essence of a plant etc | - |
| (adjective) of the greatest importance | Synonyms: all-important, all important, crucial, of the essence |
| (adjective) absolutely necessary; vitally necessary | Synonyms: indispensable |
| (noun) anything indispensable | Synonyms: necessary, necessity, requirement, requisite |
| esthetical | (adjective) concerning or characterized by an appreciation of beauty or good taste | Synonyms: aesthetic, aesthetical, esthetic |
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| estival | (adjective) (rare) of or occurring in summer | Synonyms: aestival |
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| estuarial | (adjective) of or relating to or found in estuaries | Synonyms: estuarine |
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| eternal | (adjective) tiresomely long; seemingly without end | Synonyms: endless, interminable |
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| (adjective) continuing forever or indefinitely | Synonyms: aeonian, ageless, eonian, everlasting, perpetual, unceasing, unending |
| ethanal | (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs | Synonyms: acetaldehyde |
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| ethereal | (adjective) of or containing or dissolved in ether | - |
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| (adjective) characterized by unusual lightness and delicacy | Synonyms: gossamer |
| (adjective) of heaven or the spirit | Synonyms: celestial, supernal |
| (adjective) characterized by lightness and insubstantiality; as impalpable or intangible as air | Synonyms: aerial, aeriform, aery, airy |
| ethical | (adjective) conforming to accepted standards of social or professional behavior | - |
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| (adjective) of or relating to the philosophical study of ethics | - |
| (adjective) adhering to ethical and moral principles | Synonyms: honorable, honourable |
| ethnical | (adjective) denoting or deriving from or distinctive of the ways of living built up by a group of people | Synonyms: cultural, ethnic |
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| ethnographical | (adjective) of or relating to ethnography | Synonyms: ethnographic |
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| ethnological | (adjective) of or relating to ethnology | Synonyms: ethnologic |
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| etiological | (adjective) relating to the etiology of a disease | Synonyms: aetiologic, aetiological, etiologic |
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| (adjective) of or relating to the philosophical study of causation | Synonyms: aetiologic, aetiological, etiologic |
| etymological | (adjective) based on or belonging to etymology | - |
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| euphonical | (adjective) of or relating to or characterized by euphony | Synonyms: euphonic |
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| evangelical | (adjective) of or pertaining to or in keeping with the Christian gospel especially as in the first 4 books of the New Testament | - |
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| (adjective) relating to or being a Christian church believing in personal conversion and the inerrancy of the Bible especially the 4 Gospels | - |
| (adjective) marked by ardent or zealous enthusiasm for a cause | Synonyms: evangelistic |
| eventual | (adjective) expected to follow in the indefinite future from causes already operating | - |
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| evidential | (adjective) serving as or based on evidence | Synonyms: evidentiary |
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| exaugural | (adjective) occurring at or marking the close of a term of office | - |
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| exceptional | (adjective) deviating widely from a norm of physical or mental ability; used especially of children below normal in intelligence | - |
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| (adjective) far beyond what is usual in magnitude or degree | Synonyms: exceeding, olympian, prodigious, surpassing |
| (adjective) surpassing what is common or usual or expected | Synonyms: especial, particular, special |
| exegetical | (adjective) relating to exegesis | Synonyms: exegetic |
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| existential | (adjective) relating to or dealing with existence (especially with human existence) | - |
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| (adjective) of or as conceived by existentialism | - |
| (adjective) derived from experience or the experience of existence | Synonyms: experiential |
| exothermal | (adjective) (of a chemical reaction or compound) occurring or formed with the liberation of heat | Synonyms: exothermic, heat-releasing |
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| experiential | (adjective) relating to or resulting from experience | - |
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| (adjective) derived from experience or the experience of existence | Synonyms: existential |
| experimental | (adjective) relating to or based on experiment | - |
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| (adjective) relying on observation or experiment | Synonyms: data-based, observational |
| (adjective) of the nature of or undergoing an experiment | - |
| exponential | (adjective) of or involving exponents | - |
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| (noun) a function in which an independent variable appears as an exponent | Synonyms: exponential function |
| extensional | (adjective) defining a word by listing the class of entities to which the word correctly applies | - |
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| external | (adjective) happening or arising or located outside or beyond some limits or especially surface | - |
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| (adjective) coming from the outside | Synonyms: extraneous, outside |
| (adjective) from or between other countries | Synonyms: international, outside |
| (adjective) purely outward or superficial | - |
| (noun) outward features | - |
| exterritorial | (adjective) outside territorial limits or jurisdiction | Synonyms: extraterritorial |
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| extradural | (adjective) on or outside the dura mater | Synonyms: epidural |
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| extrajudicial | (adjective) beyond the usual course of legal proceedings; legally unwarranted | - |
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| extralegal | (adjective) not regulated or sanctioned by law | Synonyms: nonlegal |
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| extramarital | (adjective) characterized by adultery | Synonyms: adulterous, extracurricular |
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| extramural | (adjective) carried on outside the bounds of an institution or community | - |
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| extraterrestrial | (adjective) originating or located or occurring outside Earth or its atmosphere | - |
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| (noun) a form of life assumed to exist outside the Earth or its atmosphere | Synonyms: alien, extraterrestrial being |
| extraterritorial | (adjective) outside territorial limits or jurisdiction | Synonyms: exterritorial |
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| exuvial | (adjective) of or relating to the cast-off skins or cuticles of various animals | - |
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| facial | (adjective) of or concerning the face | - |
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| (adjective) of or pertaining to the outside surface of an object | - |
| (noun) care for the face that usually involves cleansing and massage and the application of cosmetic creams | - |
| (noun) cranial nerve that supplies facial muscles | Synonyms: facial nerve, nervus facialis, seventh cranial nerve |
| factorial | (adjective) of or relating to factorials | - |
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| (noun) the product of all the integers up to and including a given integer | - |
| factual | (adjective) of or relating to or characterized by facts | - |
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| (adjective) existing in act or fact | Synonyms: actual |
| faecal | (adjective) of or relating to feces | Synonyms: fecal |
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| fallal | (noun) cheap showy jewelry or ornament on clothing | Synonyms: bangle, bauble, gaud, gewgaw, novelty, trinket |
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| familial | (adjective) relating to or having the characteristics of a family | - |
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| (adjective) occurring among members of a family usually by heredity | Synonyms: genetic, hereditary, inherited, transmissible, transmitted |
| fanatical | (adjective) marked by excessive enthusiasm for and intense devotion to a cause or idea | Synonyms: fanatic, overzealous, rabid |
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| fantastical | (adjective) ludicrously odd | Synonyms: antic, fantastic, grotesque |
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| (adjective) existing in fancy only | Synonyms: fantastic |
| farcical | (adjective) broadly or extravagantly humorous; resembling farce | Synonyms: ludicrous, ridiculous |
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| fatal | (adjective) bringing death | - |
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| (adjective) having momentous consequences; of decisive importance | Synonyms: fateful |
| (adjective) controlled or decreed by fate; predetermined | Synonyms: fateful |
| (adjective) (of events) having extremely unfortunate or dire consequences; bringing ruin | Synonyms: black, calamitous, disastrous, fateful |
| faucal | (adjective) of or relating to the fauces | - |
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| fecal | (adjective) of or relating to feces | Synonyms: faecal |
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| federal | (adjective) characterized by or constituting a form of government in which power is divided between one central and several regional authorities | - |
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| (adjective) of or relating to the central government of a federation | - |
| (adjective) national; especially in reference to the government of the United States as distinct from that of its member units | - |
| femoral | (adjective) of or relating to or near the femur or thigh | - |
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| fenestral | (adjective) of or relating to windows | - |
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| (adjective) of or relating to or having a fenestra | - |
| feral | (adjective) wild and menacing | Synonyms: ferine, savage |
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| ferial | (adjective) of or relating to or being a feria | - |
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| festal | (adjective) offering fun and gaiety | Synonyms: festive, gay, merry |
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| festival | (noun) an organized series of acts and performances (usually in one place) | Synonyms: fete |
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| (noun) a day or period of time set aside for feasting and celebration | - |
| fetal | (adjective) of or relating to a fetus | Synonyms: foetal |
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| feudal | (adjective) of or relating to or characteristic of feudalism | Synonyms: feudalistic |
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