| estrus | (noun) applies to nonhuman mammals: a state or period of heightened sexual arousal and activity | Synonyms: heat, oestrus, rut |
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| ethnocentrism | (noun) belief in the superiority of one's own ethnic group | - |
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| eutrophication | (noun) excessive nutrients in a lake or other body of water, usually caused by runoff of nutrients (animal waste, fertilizers, sewage) from the land, which causes a dense growth of plant life; the decomposition of the plants depletes the supply of oxygen, leading to the death of animal life | - |
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| eventration | (noun) protrusion of the intestine through the abdominal wall | - |
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| executrix | (noun) a woman executor | - |
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| exotropia | (noun) strabismus in which one or both eyes are directed outward | Synonyms: divergent strabismus, walleye |
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| expatriate | (noun) a person who is voluntarily absent from home or country | Synonyms: exile, expat |
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| expatriation | (noun) the act of expelling a person from their native land | Synonyms: deportation, exile, transportation |
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| (noun) migration from a place (especially migration from your native country in order to settle in another) | Synonyms: emigration, out-migration |
| extra | (noun) something additional of the same kind | Synonyms: duplicate |
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| (noun) an additional edition of a newspaper (usually to report a crisis) | - |
| (noun) a minor actor in crowd scenes | Synonyms: spear carrier, supernumerary |
| 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 |
| extradition | (noun) the surrender of an accused or convicted person by one state or country to another (usually under the provisions of a statute or treaty) | - |
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| extrados | (noun) the exterior curve of an arch | - |
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| extraneity | (noun) The state of not forming an essential or vital part. | Synonyms: extraneousness |
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| extraneousness | (noun) The state of not forming an essential or vital part. | Synonyms: extraneity |
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| (noun) unrelatedness by virtue of falling outside the matter at hand | - |
| extraordinariness | (noun) the quality of being extraordinary and not commonly encountered | - |
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| extrapolation | (noun) (mathematics) calculation of the value of a function outside the range of known values | - |
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| (noun) an inference about the future (or about some hypothetical situation) based on known facts and observations | - |
| extrasystole | (noun) a premature systole resulting in a momentary cardiac arrhythmia | - |
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| extraterrestrial | (noun) a form of life assumed to exist outside the Earth or its atmosphere | Synonyms: alien, extraterrestrial being |
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| extravagance | (noun) the activity of excessive spending | Synonyms: high life, highlife, lavishness, prodigality |
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| (noun) the trait of spending extravagantly | Synonyms: prodigality, profligacy |
| (noun) the quality of exceeding the appropriate limits of decorum or probability or truth | Synonyms: extravagancy |
| extravagancy | (noun) the quality of exceeding the appropriate limits of decorum or probability or truth | Synonyms: extravagance |
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| extravaganza | (noun) any lavishly staged or spectacular entertainment | - |
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| extravasation | (noun) the process of exuding or passing out of a vessel into surrounding tissues; said of blood or lymph or urine | - |
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| (noun) (of volcanoes) pouring out fumes or lava (or a deposit so formed) | Synonyms: eructation, eruption |
| (noun) an extravasated liquid (blood or lymph or urine); the product of extravasation | - |
| extraversion | (noun) (psychology) an extroverted disposition; concern with what is outside the self | Synonyms: extroversion |
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| extravert | (noun) (psychology) a person concerned more with practical realities than with inner thoughts and feelings | Synonyms: extrovert |
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| extreme | (noun) the furthest or highest degree of something | - |
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| (noun) the point located farthest from the middle of something | Synonyms: extreme point, extremum |
| extremeness | (noun) the quality of being extreme | - |
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| extremism | (noun) any political theory favoring immoderate uncompromising policies | - |
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| extremist | (noun) a person who holds extreme views | - |
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| extremity | (noun) an external body part that projects from the body | Synonyms: appendage, member |
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| (noun) that part of a limb that is farthest from the torso | - |
| (noun) the outermost or farthest region or point | - |
| (noun) the greatest or utmost degree | - |
| (noun) an extreme condition or state (especially of adversity or disease) | - |
| extremum | (noun) the point located farthest from the middle of something | Synonyms: extreme, extreme point |
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| (noun) the most extreme possible amount or value | Synonyms: peak |
| extrication | (noun) the act of releasing from a snarled or tangled condition | Synonyms: disentanglement, unsnarling, untangling |
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| extropy | (noun) the prediction that human intelligence and technology will enable life to expand in an orderly way throughout the entire universe | - |
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| extrospection | (noun) examination or observation of what is outside oneself, as opposed to introspection. | - |
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| extroversion | (noun) (psychology) an extroverted disposition; concern with what is outside the self | Synonyms: extraversion |
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| extrovert | (noun) (psychology) a person concerned more with practical realities than with inner thoughts and feelings | Synonyms: extravert |
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| extrusion | (noun) squeezing out by applying pressure | Synonyms: expulsion |
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| (noun) something that bulges out or is protuberant or projects from its surroundings | Synonyms: bulge, bump, excrescence, gibbosity, gibbousness, hump, jut, prominence, protrusion, protuberance, swelling |
| eyestrain | (noun) a tiredness of the eyes caused by prolonged close work by a person with an uncorrected vision problem | Synonyms: asthenopia |
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| femtochemistry | (noun) the branch of chemistry that studies elementary (often very fast) chemical reactions as they occur; the experimental methods are often based on the use of femtosecond laser pulses | - |
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| femtometre | (noun) a metric unit of length equal to one quadrillionth of a meter | Synonyms: femtometer, fermi |
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| fenestra | (noun) a small opening covered with membrane (especially one in the bone between the middle and inner ear) | - |
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| fenestration | (noun) surgical procedure that creates a new fenestra to the cochlea in order to restore hearing lost because of osteosclerosis | - |
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| (noun) the arrangement of windows in a building | - |
| fetometry | (noun) measurement of a fetus (especially the diameter of the head) | Synonyms: foetometry |
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| filtrate | (noun) the product of filtration; a gas or liquid that has been passed through a filter | - |
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| filtration | (noun) the act of changing a fluid by passing it through a filter | - |
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| (noun) the process whereby fluids pass through a filter or a filtering medium | - |
| firetrap | (noun) a building that would be hard to escape from if it were to catch fire | - |
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| flunitrazepam | (noun) a depressant and tranquilizer (trade name Rohypnol) often used in the commission of sexual assault; legally available in Europe and Mexico and Colombia | Synonyms: Rohypnol |
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| flytrap | (noun) a trap for catching flies | - |
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| foetometry | (noun) measurement of a fetus (especially the diameter of the head) | Synonyms: fetometry |
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| footrace | (noun) a race run on foot | Synonyms: foot race, run |
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| footrest | (noun) a low seat or a stool to rest the feet of a seated person | Synonyms: footstool, ottoman, tuffet |
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| forestry | (noun) the science of planting and caring for forests and the management of growing timber | - |
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| fornicatress | (noun) a woman adulterer | Synonyms: adulteress, hussy, jade, loose woman, slut, strumpet, trollop |
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| fortress | (noun) a fortified defensive structure | Synonyms: fort |
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| foxtrot | (noun) a ballroom dance in quadruple time; combines short and long and fast and slow steps fixed sequences | Synonyms: fox-trot |
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| fratricide | (noun) the murder of your sibling | - |
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| (noun) fire that injures or kills an ally | Synonyms: friendly fire |
| (noun) a person who murders their brother or sister | - |
| frustration | (noun) an act of hindering someone's plans or efforts | Synonyms: foiling, thwarting |
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| (noun) the feeling that accompanies an experience of being thwarted in attaining your goals | Synonyms: defeat |
| (noun) a feeling of annoyance at being hindered or criticized | - |
| gadgetry | (noun) appliances collectively | - |
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| gallantry | (noun) polite attentiveness to women | - |
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| (noun) the qualities of a hero or heroine; exceptional or heroic courage when facing danger (especially in battle) | Synonyms: heroism, valiance, valiancy, valor, valorousness, valour |
| (noun) courtesy towards women | Synonyms: chivalry, politesse |
| gantry | (noun) a framework of steel bars raised on side supports to bridge over or around something; can display railway signals above several tracks or can support a traveling crane etc. | Synonyms: gauntry |
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| gastralgia | (noun) an ache localized in the stomach or abdominal region | Synonyms: bellyache, stomach ache, stomachache |
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| gastrectomy | (noun) surgical removal of all or part of the stomach | - |
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| gastrin | (noun) polypeptide hormone secreted by the mucous lining of the stomach; when peptides and amino acids are present in the small intestine the secretion of gastric acid is stimulated | - |
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| gastritis | (noun) inflammation of the lining of the stomach; nausea and loss of appetite and discomfort after eating | - |
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| gastrocnemius | (noun) the muscle in the back part of the leg that forms the greater part of the calf; responsible for the plantar flexion of the foot | Synonyms: gastrocnemius muscle |
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| gastroenteritis | (noun) inflammation of the stomach and intestines; can be caused by Salmonella enteritidis | Synonyms: intestinal flu, stomach flu |
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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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| gastrogavage | (noun) feeding a nutrient solution into the stomach through a tube through a surgically created opening | - |
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| gastrolobium | (noun) any of various Australian evergreen shrubs of the genus Gastrolobium having whorled compound leaves poisonous to livestock and showy yellow to deep reddish-orange flowers followed by two-seeded pods | Synonyms: poison bush, poison pea |
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| gastromy | (noun) surgical incision into the stomach | - |
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| gastromycete | (noun) any fungus of the class Gasteromycetes | Synonyms: gasteromycete |
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| gastronome | (noun) a person devoted to refined sensuous enjoyment (especially good food and drink) | Synonyms: bon vivant, epicure, epicurean, foodie, gourmet |
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| gastronomy | (noun) the art and practice of choosing and preparing and eating good food | - |
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| (noun) a particular style of cookery (as of a region) | - |
| gastropod | (noun) a class of mollusks typically having a one-piece coiled shell and flattened muscular foot with a head bearing stalked eyes | Synonyms: univalve |
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| gastroscope | (noun) a type of endoscope for visually examining the stomach | - |
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| gastroscopy | (noun) visual examination of the stomach by means of a gastroscope inserted through the esophagus | - |
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| gastrostomy | (noun) surgical creation of an opening through the abdominal wall into the stomach (as for gastrogavage) | - |
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| gastrula | (noun) double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm | - |
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| gastrulation | (noun) the process in which a gastrula develops from a blastula by the inward migration of cells | - |
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| gauntry | (noun) a framework of steel bars raised on side supports to bridge over or around something; can display railway signals above several tracks or can support a traveling crane etc. | Synonyms: gantry |
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| geartrain | (noun) wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed | Synonyms: gear, gearing, power train, train |
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| gentrification | (noun) the restoration of run-down urban areas by the middle class (resulting in the displacement of low-income residents) | - |
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| gentry | (noun) the most powerful members of a society | Synonyms: aristocracy |
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| geochemistry | (noun) the chemistry of the earth's crust | - |
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| geometrician | (noun) a mathematician specializing in geometry | Synonyms: geometer |
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| geometrid | (noun) slender-bodied broad-winged moth whose larvae are called measuring worms | Synonyms: geometrid moth |
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| geometry | (noun) the pure mathematics of points and lines and curves and surfaces | - |
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| geostrategy | (noun) the branch of geopolitics dealing with strategy | - |
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| geotropism | (noun) an orienting response to gravity | - |
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| geriatrician | (noun) a specialist in gerontology | Synonyms: gerontologist |
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| geriatrics | (noun) the branch of medical science that deals with diseases and problems specific to old people | Synonyms: gerontology |
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| globetrotter | (noun) someone who travels widely and often | Synonyms: world traveler |
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| goitre | (noun) abnormally enlarged thyroid gland; can result from underproduction or overproduction of hormone or from a deficiency of iodine in the diet | Synonyms: goiter, struma, thyromegaly |
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| goitrogen | (noun) any substance (such as thiouracil) that induces the formation of a goiter | - |
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| gonadotrophin | (noun) hormone secreted by the anterior pituitary gland and placenta; stimulates the gonads and controls reproductive activity | Synonyms: gonadotrophic hormone, gonadotropic hormone, gonadotropin |
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