| enteroscope | (noun) an instrument for inspecting the inside of the intestine. | - |
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| enterostenosis | (noun) abnormal narrowing of the intestine | - |
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| enterostomy | (noun) surgical operation that creates a permanent opening through the abdominal wall into the intestine | Synonyms: enterotomy |
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| enterotomy | (noun) surgical operation that creates a permanent opening through the abdominal wall into the intestine | Synonyms: enterostomy |
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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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| enterovirus | (noun) any of a group of picornaviruses that infect the gastrointestinal tract and can spread to other areas (especially the nervous system) | - |
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| ephemeron | (noun) anything short-lived, as an insect that lives only for a day in its winged form | Synonyms: ephemeral |
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| ephemeropteran | (noun) short-lived insect | Synonyms: ephemerid |
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| ergocalciferol | (noun) a fat-soluble vitamin that prevents rickets | Synonyms: calciferol, cholecalciferol, D, viosterol, vitamin D |
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| ergosterol | (noun) a plant sterol that is converted into vitamin D by ultraviolet radiation | - |
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| eroding | (noun) (geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively | Synonyms: eating away, erosion, wearing, wearing away |
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| eros | (noun) a desire for sexual intimacy | Synonyms: concupiscence, physical attraction, sexual desire |
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| erosion | (noun) (geology) the mechanical process of wearing or grinding something down (as by particles washing over it), also figuratively | Synonyms: eating away, eroding, wearing, wearing away |
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| (noun) erosion by chemical action | Synonyms: corroding, corrosion |
| (noun) a gradual decline of something | - |
| (noun) condition in which the earth's surface is worn away by the action of water and wind | - |
| erosiveness | (noun) The state or quality of causing or tending to wear away or erode. | - |
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| erotic | (noun) an erotic person | - |
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| erotica | (noun) creative activity (writing or pictures or films etc.) of no literary or artistic value other than to stimulate sexual desire | Synonyms: porn, porno, pornography, smut |
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| eroticism | (noun) the arousal of feelings of sexual desire | Synonyms: amativeness, amorousness, erotism, sexiness |
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| (noun) a state of anticipation of sexuality | Synonyms: erotism |
| erotism | (noun) the arousal of feelings of sexual desire | Synonyms: amativeness, amorousness, eroticism, sexiness |
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| (noun) a state of anticipation of sexuality | Synonyms: eroticism |
| exteroception | (noun) sensitivity to stimuli originating outside of the body | - |
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| exteroceptor | (noun) any receptor that responds to stimuli outside the body | - |
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| falderol | (noun) ornamental objects of no great value | Synonyms: folderal, frill, gimcrack, gimcrackery, nonsense, trumpery |
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| ferociousness | (noun) the trait of extreme cruelty | Synonyms: brutality, savagery, viciousness |
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| ferocity | (noun) the property of being wild or turbulent | Synonyms: fierceness, furiousness, fury, vehemence, violence, wildness |
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| fiberoptics | (noun) the transmission of light signals via glass fibers | Synonyms: fiber optics, fibre optics, fibreoptics |
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| fireroom | (noun) (nautical) chamber or compartment in which the furnaces of a ship are stoked or fired | Synonyms: stokehold, stokehole |
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| flerovium | (noun) a radioactive transuranic element | Synonyms: Fl |
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| folderol | (noun) nonsensical talk or writing | Synonyms: applesauce, codswallop, rubbish, trash, tripe, trumpery, wish-wash |
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| fumeroot | (noun) delicate European herb with greyish leaves and spikes of purplish flowers; formerly used medicinally | Synonyms: Fumaria officinalis, fumewort, fumitory |
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| (noun) herb of northern Europe and Asia having erect racemes of red flowers | Synonyms: Corydalis solida, fumewort |
| gasteromycete | (noun) any fungus of the class Gasteromycetes | Synonyms: gastromycete |
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| gastroenterologist | (noun) a physician who specializes in diseases of the gastrointestinal tract | - |
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| gastroenterology | (noun) the branch of medicine that studies the gastrointestinal tract and its diseases | - |
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| gastroenterostomy | (noun) surgical creation of an opening between the stomach wall and the small intestines; performed when the normal opening has been eliminated | - |
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| generosity | (noun) acting generously | Synonyms: unselfishness |
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| (noun) the trait of being willing to give your money or time | Synonyms: generousness |
| generousness | (noun) the trait of being willing to give your money or time | Synonyms: generosity |
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| gerontocracy | (noun) a political system governed by old men | - |
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| gerontologist | (noun) a specialist in gerontology | Synonyms: geriatrician |
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| gerontology | (noun) the branch of medical science that deals with diseases and problems specific to old people | Synonyms: geriatrics |
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| gingerol | (noun) derived from ginger; source of the hotness of ginger | - |
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| glycerogel | (noun) a medicated skin preparation made from glycerin and glycerinated gelatin | Synonyms: glycerogelatin |
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| glycerogelatin | (noun) a medicated skin preparation made from glycerin and glycerinated gelatin | Synonyms: glycerogel |
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| glycerol | (noun) a sweet syrupy trihydroxy alcohol obtained by saponification of fats and oils | Synonyms: glycerin, glycerine |
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| glycerole | (noun) a medicine made by mixing a substance in glycerin | Synonyms: glycerite |
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| graverobber | (noun) someone who takes bodies from graves and sells them for anatomical dissection | Synonyms: body snatcher, ghoul |
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| (noun) someone who steals valuables from graves or crypts | - |
| haemosiderosis | (noun) abnormal deposit of hemosiderin; often a symptom of thalassemia or hemochromatosis | Synonyms: hemosiderosis |
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| hedgerow | (noun) a fence formed by a row of closely planted shrubs or bushes | Synonyms: hedge |
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| hemerobiid | (noun) small dark-colored lacewing fly | Synonyms: brown lacewing, hemerobiid fly |
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| hemipteron | (noun) insects with sucking mouthparts and forewings thickened and leathery at the base; usually show incomplete metamorphosis | Synonyms: bug, hemipteran, hemipterous insect |
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| hemosiderosis | (noun) abnormal deposit of hemosiderin; often a symptom of thalassemia or hemochromatosis | Synonyms: haemosiderosis |
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| hero | (noun) the principal character in a play or movie or novel or poem | - |
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| (noun) a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States | Synonyms: bomber, Cuban sandwich, grinder, hero sandwich, hoagie, hoagy, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep |
| (noun) a person distinguished by exceptional courage and nobility and strength | - |
| (noun) someone who fights for a cause | Synonyms: champion, fighter, paladin |
| (noun) (classical mythology) a being of great strength and courage celebrated for bold exploits; often the offspring of a mortal and a god | - |
| heroic | (noun) a verse form suited to the treatment of heroic or elevated themes; dactylic hexameter or iambic pentameter | Synonyms: heroic meter, heroic verse |
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| heroics | (noun) ostentatious or vainglorious or extravagant or melodramatic conduct | - |
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| heroin | (noun) a narcotic that is considered a hard drug; a highly addictive morphine derivative; intravenous injection provides the fastest and most intense rush | Synonyms: diacetylmorphine |
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| heroine | (noun) a woman possessing heroic qualities or a woman who has performed heroic deeds | - |
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| (noun) the main good female character in a work of fiction | - |
| heroism | (noun) the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle) | Synonyms: gallantry, valiance, valiancy, valor, valorousness, valour |
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| heroization | (noun) the act, or the result, of making someone into a hero. | - |
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| heron | (noun) grey or white wading bird with long neck and long legs and (usually) long bill | - |
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| heronry | (noun) a breeding ground for herons; a heron rookery | - |
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| heterocycle | (noun) a ring of atoms of more than one kind; especially a ring of carbon atoms containing at least one atom that is not carbon | Synonyms: heterocyclic ring |
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| (noun) a compound containing a heterocyclic ring | Synonyms: heterocyclic, heterocyclic compound |
| heterocyclic | (noun) a compound containing a heterocyclic ring | Synonyms: heterocycle, heterocyclic compound |
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| heterodoxy | (noun) the quality of being unorthodox | Synonyms: unorthodoxy |
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| (noun) any opinions or doctrines at variance with the official or orthodox position | Synonyms: heresy, unorthodoxy |
| heterogeneity | (noun) the quality of being diverse and not comparable in kind | Synonyms: heterogeneousness |
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| heterogeneousness | (noun) the quality of being diverse and not comparable in kind | Synonyms: heterogeneity |
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| heterogenesis | (noun) the alternation of two or more different forms in the life cycle of a plant or animal | Synonyms: alternation of generations, xenogenesis |
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| heterogloss | (noun) the locative boundary of a certain linguistic feature, such as the pronunciation of a vowel, the meaning of a word, or use of some syntactic feature. | Synonyms: isogloss |
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| heterograft | (noun) tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species | Synonyms: xenograft |
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| heterology | (noun) (biology) the lack of correspondence of apparently similar body parts | - |
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| heterometabolism | (noun) development of insects with incomplete metamorphosis in which no pupal stage precedes maturity | Synonyms: heterometaboly |
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| heterometaboly | (noun) development of insects with incomplete metamorphosis in which no pupal stage precedes maturity | Synonyms: heterometabolism |
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| heteronym | (noun) two words are heteronyms if they are spelled the same way but differ in pronunciation | - |
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| heteroploid | (noun) (genetics) an organism or cell having a chromosome number that is not an even multiple of the haploid chromosome number for that species | - |
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| heteroploidy | (noun) the condition of being heteroploid | - |
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| heterosexism | (noun) discrimination in favor of heterosexual and against homosexual people | - |
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| heterosexual | (noun) a person having a sexual orientation to persons of the opposite sex | Synonyms: heterosexual person, straight, straight person |
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| heterosexualism | (noun) a sexual attraction to (or sexual relations with) persons of the opposite sex | Synonyms: heterosexuality, straightness |
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| heterosexuality | (noun) a sexual attraction to (or sexual relations with) persons of the opposite sex | Synonyms: heterosexualism, straightness |
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| heterosis | (noun) (genetics) the tendency of a crossbred organism to have qualities superior to those of either parent | Synonyms: hybrid vigor |
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| heterospory | (noun) the development of both microspores and megaspores | - |
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| heterostracan | (noun) extinct jawless fish with the anterior part of the body covered with bony plates; of the Silurian and Devonian | - |
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| heterotaxy | (noun) any abnormal position of the organs of the body | Synonyms: transposition |
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| heterotroph | (noun) an organism that depends on complex organic substances for nutrition | - |
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| heterozygosity | (noun) the state of being heterozygous; having two different alleles of the same gene | - |
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| heterozygote | (noun) (genetics) an organism having two different alleles of a particular gene and so giving rise to varying offspring | - |
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| hierocracy | (noun) a ruling body composed of clergy | - |
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| hieroglyph | (noun) a writing system using picture symbols; used in ancient Egypt | Synonyms: hieroglyphic |
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| (noun) writing that resembles hieroglyphics (usually by being illegible) | Synonyms: hieroglyphic |
| hieroglyphic | (noun) a writing system using picture symbols; used in ancient Egypt | Synonyms: hieroglyph |
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| (noun) writing that resembles hieroglyphics (usually by being illegible) | Synonyms: hieroglyph |
| hierolatry | (noun) the worship of saints | Synonyms: hagiolatry |
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| homeroom | (noun) a classroom in which all students in a particular grade (or in a division of a grade) meet at certain times under the supervision of a teacher who takes attendance and does other administrative business | Synonyms: home room |
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| homoeroticism | (noun) a sexual attraction to (or sexual relations with) persons of the same sex | Synonyms: gayness, homosexualism, homosexuality, queerness |
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| houseroom | (noun) space for accommodation in a house | - |
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| hymenopteron | (noun) insects having two pairs of membranous wings and an ovipositor specialized for stinging or piercing | Synonyms: hymenopter, hymenopteran, hymenopterous insect |
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| hyperaldosteronism | (noun) a condition caused by overproduction of aldosterone | Synonyms: aldosteronism |
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| hypercholesterolemia | (noun) the presence of an abnormal amount of cholesterol in the cells and plasma of the blood; associated with the risk of atherosclerosis | Synonyms: hypercholesteremia |
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| hyperon | (noun) any baryon that is not a nucleon; unstable particle with mass greater than a neutron | - |
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| hyperope | (noun) a person with hyperopia; a farsighted person | - |
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| hyperopia | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropia, hypermetropy, longsightedness |
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| hysterocatalepsy | (noun) hysteria with cataleptic symptoms | - |
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| hysterosalpingogram | (noun) X ray of the uterus and Fallopian tubes; usually done in diagnosing infertility (to see if there any blockages) | - |
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| hysteroscopy | (noun) visual examination of the uterus and uterine lining using an endoscope inserted through the vagina | - |
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| hysterotomy | (noun) surgical incision into the uterus (as in cesarean section) | - |
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