| endolymph | (noun) the bodily fluid that fills the membranous labyrinth of the inner ear | - |
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| endometriosis | (noun) the presence of endometrium elsewhere than in the lining of the uterus; causes premenstrual pain and dysmenorrhea | Synonyms: adenomyosis |
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| endometritis | (noun) inflammation of the lining of the uterus (of the endometrium) | Synonyms: metritis |
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| endometrium | (noun) (pregnancy) the mucous membrane that lines the uterus; thickens under hormonal control and (if pregnancy does not occur) is shed in menstruation; if pregnancy occurs it is shed along with the placenta at parturition | - |
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| endomorph | (noun) a heavy person with a soft and rounded body | - |
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| endomorphy | (noun) round, fat, and heavy | Synonyms: pyknic type |
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| endoneurium | (noun) delicate connective tissue around individual nerve fibers in nerve | - |
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| endonuclease | (noun) a nuclease that cleaves nucleic acids at interior bonds and so produces fragments of various sizes | - |
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| endoparasite | (noun) any of various parasites that live in the internal organs of animals (especially intestinal worms) | Synonyms: endozoan, entoparasite, entozoan, entozoon |
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| endoplasm | (noun) the inner portion of the cytoplasm of a cell | - |
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| endopsammon | (noun) The microscopic fauna of sand and mud. | - |
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| endorphin | (noun) a neurochemical occurring naturally in the brain and having analgesic properties | - |
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| endorsement | (noun) the act of endorsing | Synonyms: indorsement |
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| (noun) formal and explicit approval | Synonyms: countenance, imprimatur, indorsement, sanction, warrant |
| (noun) a promotional statement (as found on the dust jackets of books) | Synonyms: blurb, indorsement |
| (noun) a speech seconding a motion | Synonyms: indorsement, second, secondment |
| (noun) a signature that validates something | Synonyms: indorsement |
| endorser | (noun) someone who expresses strong approval | Synonyms: indorser, ratifier, subscriber |
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| (noun) a person who transfers his ownership interest in something by signing a check or negotiable security | Synonyms: indorser |
| endoscope | (noun) a long slender medical instrument for examining the interior of a bodily organ or performing minor surgery | - |
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| endoscopy | (noun) visual examination of the interior of a hollow body organ by use of an endoscope | - |
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| endoskeleton | (noun) the internal skeleton; bony and cartilaginous structure (especially of vertebrates) | - |
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| endosperm | (noun) nutritive tissue surrounding the embryo within seeds of flowering plants | - |
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| endospore | (noun) a small asexual spore that develops inside the cell of some bacteria and algae | - |
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| endosteum | (noun) vascular membrane that lines the inner surface of long bones | - |
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| endothelium | (noun) an epithelium of mesoblastic origin; a thin layer of flattened cells that lines the inside of some body cavities | - |
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| 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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| endowment | (noun) the act of endowing with a permanent source of income | - |
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| (noun) natural abilities or qualities | Synonyms: gift, natural endowment, talent |
| (noun) the capital that provides income for an institution | Synonyms: endowment fund |
| endozoan | (noun) any of various parasites that live in the internal organs of animals (especially intestinal worms) | Synonyms: endoparasite, entoparasite, entozoan, entozoon |
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| endplate | (noun) the flattened end of a motor neuron that transmits neural impulses to a muscle | Synonyms: end-plate, motor end plate |
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| endpoint | (noun) a place where something ends or is complete | Synonyms: end point, termination, terminus |
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| endurance | (noun) the power to withstand hardship or stress | - |
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| (noun) a state of surviving; remaining alive | Synonyms: survival |
| enduringness | (noun) permanence by virtue of the power to resist stress or force | Synonyms: durability, lastingness, strength |
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| ependyma | (noun) thin epithelial membrane lining the ventricles of the brain and the spinal cord canal | - |
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| epicondyle | (noun) a projection on a bone above a condyle serving for the attachment of muscles and ligaments | - |
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| epicondylitis | (noun) painful inflammation of the muscles and soft tissues around an epicondyle | - |
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| epidendron | (noun) any of various orchids of the genus Epidendrum | - |
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| errand | (noun) a short trip that is taken in the performance of a necessary task or mission | - |
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| expandability | (noun) A physical property of gases, denoting that they expand to fill their containers. | - |
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| expander | (noun) an electronic device that increases the dynamic range of the audio signal. | - |
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| expender | (noun) someone who spends money to purchase goods or services | Synonyms: disburser, spender |
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| expending | (noun) the act of spending money for goods or services | Synonyms: expenditure |
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| expenditure | (noun) the act of spending money for goods or services | Synonyms: expending |
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| (noun) the act of consuming something | Synonyms: consumption, using up |
| (noun) money paid out; an amount spent | Synonyms: outgo, outlay, spending |
| explanandum | (noun) (logic) a statement of something (a fact or thing or expression) to be explained | Synonyms: explicandum |
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| explicandum | (noun) (logic) a statement of something (a fact or thing or expression) to be explained | Synonyms: explanandum |
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| expounder | (noun) a person who explains | Synonyms: expositor |
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| expounding | (noun) a systematic interpretation or explanation (usually written) of a specific topic | Synonyms: exposition |
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| fairground | (noun) an open area for holding fairs or exhibitions or circuses | - |
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| fairyland | (noun) something existing solely in the imagination (but often mistaken for reality) | Synonyms: fantasy world, phantasy world |
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| (noun) the enchanted realm of fairies | Synonyms: faerie, faery |
| fandango | (noun) a provocative Spanish courtship dance in triple time; performed by a man and a woman playing castanets | - |
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| fandom | (noun) the fans of a sport or famous person | - |
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| farandole | (noun) a lively dance from Provence; all the dancers join hands and execute various figures | - |
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| farmhand | (noun) a hired hand on a farm | Synonyms: farm worker, field hand, fieldhand |
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| farmland | (noun) a rural area where farming is practiced | Synonyms: farming area |
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| (noun) arable land that is worked by plowing and sowing and raising crops | Synonyms: cultivated land, ploughland, plowland, tillage, tilled land, tilth |
| fatherland | (noun) the country where you were born | Synonyms: country of origin, homeland, mother country, motherland, native land |
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| faultfinder | (noun) someone who is critical of the motives of others | Synonyms: cynic |
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| faultfinding | (noun) persistent petty and unjustified criticism | Synonyms: carping |
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| fecundation | (noun) creation by the physical union of male and female gametes; of sperm and ova in an animal or pollen and ovule in a plant | Synonyms: fertilisation, fertilization, impregnation |
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| (noun) making fertile as by applying fertilizer or manure | Synonyms: dressing, fertilisation, fertilization |
| fecundity | (noun) the quality of something that causes or assists healthy growth | Synonyms: fruitfulness |
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| (noun) the intellectual productivity of a creative imagination | Synonyms: fruitfulness |
| (noun) the state of being fertile; capable of producing offspring | Synonyms: fertility |
| feeblemindedness | (noun) severe mental deficiency | - |
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| femtosecond | (noun) one quadrillionth (10^-15) of a second; one thousandth of a picosecond | - |
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| fender | (noun) a cushion-like device that reduces shock due to an impact | Synonyms: buffer |
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| (noun) a barrier that surrounds the wheels of a vehicle to block splashing water or mud | Synonyms: wing |
| (noun) a low metal guard to confine falling coals to a hearth | - |
| (noun) an inclined metal frame at the front of a locomotive to clear the track | Synonyms: buffer, cowcatcher, pilot |
| fenland | (noun) low-lying wet land with grassy vegetation; usually is a transition zone between land and water | Synonyms: fen, marsh, marshland |
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| fieldhand | (noun) a hired hand on a farm | Synonyms: farm worker, farmhand, field hand |
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| fiend | (noun) a cruel wicked and inhuman person | Synonyms: demon, devil, monster, ogre |
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| (noun) a person motivated by irrational enthusiasm (as for a cause) | Synonyms: fanatic |
| (noun) an evil supernatural being | Synonyms: daemon, daimon, demon, devil |
| find | (noun) the act of discovering something | Synonyms: discovery, uncovering |
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| (noun) a productive insight | Synonyms: breakthrough, discovery |
| finder | (noun) optical device that helps a user to find the target of interest | Synonyms: view finder, viewfinder |
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| (noun) someone who is the first to observe something | Synonyms: discoverer, spotter |
| (noun) someone who comes upon something after searching | - |
| finding | (noun) the act of determining the properties of something, usually by research or calculation | Synonyms: determination |
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| (noun) the decision of a court on issues of fact or law | - |
| (noun) something that is found | - |
| findings | (noun) a collection of tools and other articles used by an artisan to make jewelry or clothing or shoes | - |
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| findom | (noun) pejorative term for when a man gives money to a woman | - |
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| (noun) a fetish where the submissive is forced to give money to a dominant | - |
| firebrand | (noun) someone who deliberately foments trouble | Synonyms: inciter, instigant, instigator, provoker |
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| (noun) a piece of wood that has been burned or is burning | Synonyms: brand |
| fishpond | (noun) a freshwater pond with fish | - |
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| flinders | (noun) bits and splinters and fragments | - |
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| flindosa | (noun) tall Australian timber tree yielding tough hard wood used for staves etc | Synonyms: Flindersia australis, flindosy, native beech |
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| flindosy | (noun) tall Australian timber tree yielding tough hard wood used for staves etc | Synonyms: Flindersia australis, flindosa, native beech |
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| flounder | (noun) any of various European and non-European marine flatfish | - |
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| (noun) flesh of any of various American and European flatfish | - |
| fondant | (noun) candy made of a thick creamy sugar paste | - |
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| fondler | (noun) a lover who gently fondles and caresses the loved one | Synonyms: petter |
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| (noun) a molester who touches the intimate parts of the victim | - |
| fondling | (noun) affectionate play (or foreplay without contact with the genital organs) | Synonyms: caressing, cuddling, hugging, kissing, necking, petting, smooching, snuggling |
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| fondness | (noun) a quality proceeding from feelings of affection or love | Synonyms: affectionateness, lovingness, warmth |
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| (noun) a positive feeling of liking | Synonyms: affection, affectionateness, heart, philia, tenderness, warmheartedness, warmness |
| (noun) a predisposition to like something | Synonyms: fancy, partiality |
| fondu | (noun) hot cheese or chocolate melted to the consistency of a sauce into which bread or fruits are dipped | Synonyms: fondue |
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| (noun) cubes of meat or seafood cooked in hot oil and then dipped in any of various sauces | Synonyms: fondue |
| fondue | (noun) hot cheese or chocolate melted to the consistency of a sauce into which bread or fruits are dipped | Synonyms: fondu |
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| (noun) cubes of meat or seafood cooked in hot oil and then dipped in any of various sauces | Synonyms: fondu |
| footcandle | (noun) a unit of illuminance on a surface that is everywhere 1 foot from a point source of 1 candle | - |
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| foreground | (noun) (computer science) a window for an active application | - |
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| (noun) the part of a scene that is near the viewer | - |
| foregrounding | (noun) the execution of a program that preempts the use of the processing system | Synonyms: foreground processing |
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| forehand | (noun) (sports) a return made with the palm of the hand facing the direction of the stroke (as in tennis or badminton or squash) | Synonyms: forehand shot, forehand stroke |
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| foreland | (noun) a natural elevation (especially a rocky one that juts out into the sea) | Synonyms: head, headland, promontory |
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| (noun) land forming the forward margin of something | - |
| found | (noun) food and lodging provided in addition to money | - |
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| foundation | (noun) the act of starting something for the first time; introducing something new | Synonyms: creation, founding, initiation, innovation, instauration, institution, introduction, origination |
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| (noun) lowest support of a structure | Synonyms: base, foot, fundament, groundwork, substructure, understructure |
| (noun) a woman's undergarment worn to give shape to the contours of the body | Synonyms: foundation garment |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: base, basis, cornerstone, fundament, groundwork |
| (noun) education or instruction in the fundamentals of a field of knowledge | Synonyms: grounding |
| (noun) an institution supported by an endowment | - |
| (noun) the basis on which something is grounded | - |
| founder | (noun) a person who founds or establishes some institution | Synonyms: beginner, father, founding father |
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| (noun) a worker who makes metal castings | - |
| (noun) inflammation of the laminated tissue that attaches the hoof to the foot of a horse | Synonyms: laminitis |
| foundering | (noun) (of a ship) sinking | Synonyms: going under |
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| founding | (noun) the act of starting something for the first time; introducing something new | Synonyms: creation, foundation, initiation, innovation, instauration, institution, introduction, origination |
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| foundling | (noun) a child who has been abandoned and whose parents are unknown | Synonyms: abandoned infant |
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| foundress | (noun) a woman founder | - |
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| foundry | (noun) factory where metal castings are produced | Synonyms: metalworks |
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| foxhound | (noun) medium-sized glossy-coated hounds developed for hunting foxes | - |
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| fricandeau | (noun) larded veal braised and glazed in its own juices | - |
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| friend | (noun) a person you know well and regard with affection and trust | - |
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| (noun) a person with whom you are acquainted | Synonyms: acquaintance |
| (noun) an associate who provides cooperation or assistance | Synonyms: ally |
| (noun) a person who backs a politician or a team etc. | Synonyms: admirer, booster, champion, protagonist, supporter |
| friendlessness | (noun) being without friends | - |
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| friendliness | (noun) a friendly disposition | - |
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| (noun) a feeling of liking for another person; enjoyment in their company | - |
| friendly | (noun) troops belonging to or allied with your own military forces | - |
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| friendship | (noun) the state of being friends (or friendly) | Synonyms: friendly relationship |
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| frond | (noun) compound leaf of a fern or palm or cycad | - |
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| fund | (noun) a financial institution that sells shares to individuals and invests in securities issued by other companies | Synonyms: investment company, investment firm, investment trust |
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| (noun) a reserve of money set aside for some purpose | Synonyms: monetary fund |
| (noun) a supply of something available for future use | Synonyms: stock, store |
| fundament | (noun) lowest support of a structure | Synonyms: base, foot, foundation, groundwork, substructure, understructure |
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| (noun) the fleshy part of the human body that you sit on | Synonyms: arse, ass, backside, behind, bottom, bum, buns, butt, buttocks, can, derriere, fanny, hind end, hindquarters, keister, nates, posterior, prat, rear, rear end, rump, seat, stern, tail, tail end, tooshie, tush |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: base, basis, cornerstone, foundation, groundwork |