| felly | (noun) rim (or part of the rim) into which spokes are inserted | Synonyms: felloe |
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| felon | (noun) someone who has committed a crime or has been legally convicted of a crime | Synonyms: criminal, crook, malefactor, outlaw |
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| (noun) a purulent infection at the end of a finger or toe in the area surrounding the nail | Synonyms: whitlow |
| feloniousness | (noun) The property of relating to, or having the nature of a serious criminal offense. | - |
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| felony | (noun) a serious crime (such as murder or arson) | - |
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| felspar | (noun) any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or barium | Synonyms: feldspar |
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| felt | (noun) a fabric made of compressed matted animal fibers | - |
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| felucca | (noun) a fast narrow sailing ship of the Mediterranean | - |
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| felwort | (noun) gentian of Europe and China having creamy white flowers with fringed corollas | Synonyms: gentianella amarella |
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| female | (noun) an animal that produces gametes (ova) that can be fertilized by male gametes (spermatozoa) | - |
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| (noun) a person who belongs to the sex that can have babies | Synonyms: female person |
| femaleness | (noun) the properties characteristic of the female sex | Synonyms: feminineness |
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| feminine | (noun) a gender that refers chiefly (but not exclusively) to females or to objects classified as female | - |
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| feminineness | (noun) the properties characteristic of the female sex | Synonyms: femaleness |
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| femininity | (noun) the trait of behaving in ways considered typical for women | Synonyms: muliebrity |
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| feminisation | (noun) the process of becoming feminized; the development of female characteristics (loss of facial hair or breast enlargement) in a male because of hormonal disorders or castration | Synonyms: feminization |
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| feminism | (noun) the movement aimed at equal rights for women | Synonyms: feminist movement, women's lib, women's liberation movement |
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| (noun) a doctrine that advocates equal rights for women | - |
| feminist | (noun) a supporter of feminism | Synonyms: libber, women's liberationist, women's rightist |
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| feminization | (noun) the process of becoming feminized; the development of female characteristics (loss of facial hair or breast enlargement) in a male because of hormonal disorders or castration | Synonyms: feminisation |
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| femoris | (noun) the longest and thickest bone of the human skeleton; extends from the pelvis to the knee | Synonyms: femur, thighbone |
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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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| femtometer | (noun) a metric unit of length equal to one quadrillionth of a meter | Synonyms: femtometre, fermi |
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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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| femtosecond | (noun) one quadrillionth (10^-15) of a second; one thousandth of a picosecond | - |
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| femtovolt | (noun) a unit of potential equal to one quadrillionth of a volt (or one thousandth of a picovolt) | - |
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| femur | (noun) the longest and thickest bone of the human skeleton; extends from the pelvis to the knee | Synonyms: femoris, thighbone |
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| fen | (noun) low-lying wet land with grassy vegetation; usually is a transition zone between land and water | Synonyms: fenland, marsh, marshland |
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| (noun) 100 fen equal 1 yuan in China | - |
| fence | (noun) a barrier that serves to enclose an area | Synonyms: fencing |
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| (noun) a dealer in stolen property | - |
| fencer | (noun) someone skilled at fencing | Synonyms: swordsman |
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| fencesitter | (noun) a neutral or uncommitted person (especially in politics) | Synonyms: independent, mugwump |
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| fencing | (noun) the art or sport of fighting with swords (especially the use of foils or epees or sabres to score points under a set of rules) | - |
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| (noun) a barrier that serves to enclose an area | Synonyms: fence |
| (noun) material for building fences | Synonyms: fencing material |
| 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 |
| fenestella | (noun) oval or circular opening; to allow light into a dome or vault | Synonyms: lunette |
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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 | - |
| 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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| fennel | (noun) fennel seeds are ground and used as a spice or as an ingredient of a spice mixture | - |
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| (noun) leaves used for seasoning | Synonyms: common fennel |
| (noun) aromatic bulbous stem base eaten cooked or raw in salads | Synonyms: finocchio, Florence fennel |
| (noun) any of several aromatic herbs having edible seeds and leaves and stems | - |
| fenoprofen | (noun) a nonsteroidal anti-inflammatory drug (trade name Nalfon) used in the treatment of arthritis and other painful inflammatory disorders | Synonyms: fenoprofen calcium, Nalfon |
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| fenugreek | (noun) aromatic seeds used as seasoning especially in curry | Synonyms: fenugreek seed |
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| (noun) annual herb or southern Europe and eastern Asia having off-white flowers and aromatic seeds used medicinally and in curry | Synonyms: Greek clover, Trigonella foenumgraecum |
| feoff | (noun) a piece of land held under the feudal system | Synonyms: fief |
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| fergusonite | (noun) a dark mineral consisting of oxides of yttrium and erbium and tantalum and other minerals | - |
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| feria | (noun) (in Spanish speaking regions) a local festival or fair, usually in honor of some patron saint | - |
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| (noun) a weekday on which no festival or holiday is celebrated | - |
| fermata | (noun) (music) a prolongation of unspecified length on a note or chord or rest | - |
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| (noun) a musical notation (over a note or chord or rest) that indicates it is to be prolonged by an unspecified amount | - |
| ferment | (noun) a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol | Synonyms: fermentation, fermenting, zymolysis, zymosis |
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| (noun) a state of agitation or turbulent change or development | Synonyms: agitation, fermentation, tempestuousness, unrest |
| (noun) a substance capable of bringing about fermentation | - |
| fermentation | (noun) a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol | Synonyms: ferment, fermenting, zymolysis, zymosis |
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| (noun) a state of agitation or turbulent change or development | Synonyms: agitation, ferment, tempestuousness, unrest |
| fermenting | (noun) a process in which an agent causes an organic substance to break down into simpler substances; especially, the anaerobic breakdown of sugar into alcohol | Synonyms: ferment, fermentation, zymolysis, zymosis |
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| fermentologist | (noun) a specialist in wine making | Synonyms: enologist, oenologist |
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| fermi | (noun) a metric unit of length equal to one quadrillionth of a meter | Synonyms: femtometer, femtometre |
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| fermion | (noun) any particle that obeys Fermi-Dirac statistics and is subject to the Pauli exclusion principle | - |
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| fermium | (noun) a radioactive transuranic metallic element produced by bombarding plutonium with neutrons | Synonyms: atomic number 100, Fm |
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| fern | (noun) any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores | - |
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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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| ferret | (noun) domesticated albino variety of the European polecat bred for hunting rats and rabbits | - |
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| (noun) musteline mammal of prairie regions of United States; nearly extinct | Synonyms: black-footed ferret, Mustela nigripes |
| ferricyanide | (noun) salt of ferricyanic acid obtained by oxidation of a ferrocyanide | - |
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| ferrimagnetism | (noun) a phenomenon in ferrites where there can be incomplete cancellation of antiferromagnetic arranged spins giving a net magnetic moment | - |
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| ferrite | (noun) a solid solution in which alpha iron is the solvent | - |
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| (noun) a magnetic allotrope of iron; stable below 906 degrees centigrade | Synonyms: alpha-Fe, alpha-ferrite |
| ferritin | (noun) a protein containing 20% iron that is found in the intestines and liver and spleen; it is one of the chief forms in which iron is stored in the body | - |
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| ferrocerium | (noun) a pyrophoric alloy of iron with cerium; used for lighter flints | - |
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| ferroconcrete | (noun) concrete with metal and/or mesh added to provide extra support against stresses | Synonyms: reinforced concrete |
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| ferrocyanide | (noun) salt of ferrocyanic acid usually obtained by a reaction of a cyanide with iron sulphate | - |
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| ferromagnet | (noun) any material that has ferromagnetic properties. | - |
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| ferromagnetism | (noun) phenomenon exhibited by materials like iron (nickel or cobalt) that become magnetized in a magnetic field and retain their magnetism when the field is removed | - |
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| ferrule | (noun) a metal cap or band placed on a wooden pole to prevent splitting | Synonyms: collet |
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| ferry | (noun) transport by boat or aircraft | Synonyms: ferrying |
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| (noun) a boat that transports people or vehicles across a body of water and operates on a regular schedule | Synonyms: ferryboat |
| ferryboat | (noun) a boat that transports people or vehicles across a body of water and operates on a regular schedule | Synonyms: ferry |
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| ferrying | (noun) transport by boat or aircraft | Synonyms: ferry |
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| ferryman | (noun) a man who operates a ferry | - |
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| fertilisation | (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: fecundation, fertilization, impregnation |
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| (noun) making fertile as by applying fertilizer or manure | Synonyms: dressing, fecundation, fertilization |
| fertiliser | (noun) any substance such as manure or a mixture of nitrates used to make soil more fertile | Synonyms: fertilizer, plant food |
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| fertility | (noun) the property of producing abundantly and sustaining vigorous and luxuriant growth | Synonyms: prolificacy, rankness, richness |
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| (noun) the state of being fertile; capable of producing offspring | Synonyms: fecundity |
| (noun) the ratio of live births in an area to the population of that area; expressed per 1000 population per year | Synonyms: birth rate, birthrate, fertility rate, natality |
| fertilization | (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: fecundation, fertilisation, impregnation |
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| (noun) making fertile as by applying fertilizer or manure | Synonyms: dressing, fecundation, fertilisation |
| fertilizer | (noun) any substance such as manure or a mixture of nitrates used to make soil more fertile | Synonyms: fertiliser, plant food |
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| ferule | (noun) a switch (a stick or cane or flat paddle) used to punish children | - |
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| fervency | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervidness, fervor, fervour, fire |
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| fervidness | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervor, fervour, fire |
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| fervor | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervidness, fervour, fire |
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| (noun) the state of being emotionally aroused and worked up | Synonyms: excitation, excitement, fervour, inflammation |
| fervour | (noun) feelings of great warmth and intensity | Synonyms: ardor, ardour, fervency, fervidness, fervor, fire |
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| (noun) the state of being emotionally aroused and worked up | Synonyms: excitation, excitement, fervor, inflammation |
| feryaz | (noun) a broad kaftan with long sleeves, worn by the nobility in Russia in the 16th and 17th centuries. | - |
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| fescue | (noun) grass with wide flat leaves cultivated in Europe and America for permanent pasture and hay and for lawns | Synonyms: fescue grass, Festuca elatior, meadow fescue |
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| fess | (noun) (heraldry) an ordinary consisting of a broad horizontal band across a shield | Synonyms: fesse |
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| fesse | (noun) (heraldry) an ordinary consisting of a broad horizontal band across a shield | Synonyms: fess |
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| fester | (noun) a sore that has become inflamed and formed pus | Synonyms: suppurating sore |
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| festering | (noun) a fluid product of inflammation | Synonyms: ichor, purulence, pus, sanies, suppuration |
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| (noun) (medicine) the formation of morbific matter in an abscess or a vesicle and the discharge of pus | Synonyms: maturation, suppuration |
| festination | (noun) involuntary shortening of stride and quickening of gait that occurs in some diseases (e.g., Parkinson's disease) | - |
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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 | - |
| festivity | (noun) any joyous diversion | Synonyms: celebration |
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| festoon | (noun) flower chains suspended in curves between points as a decoration | Synonyms: festoonery |
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| (noun) an embellishment consisting of a decorative representation of a string of flowers suspended between two points; used on pottery or in architectural work | - |
| (noun) a curtain of fabric draped and bound at intervals to form graceful curves | - |
| festoonery | (noun) flower chains suspended in curves between points as a decoration | Synonyms: festoon |
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| festschrift | (noun) a collection of writings published in honor of a scholar | - |
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| fetch | (noun) the action of fetching | - |
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| fete | (noun) an organized series of acts and performances (usually in one place) | Synonyms: festival |
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| (noun) an elaborate party (often outdoors) | Synonyms: feast, fiesta |
| feterita | (noun) a Sudanese sorghum having exceptionally large soft white grains | Synonyms: federita, Sorghum vulgare caudatum |
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| fetich | (noun) excessive or irrational devotion to some activity | Synonyms: fetish |
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| (noun) a charm superstitiously believed to embody magical powers | Synonyms: fetish, hoodoo, juju, voodoo |
| fetichism | (noun) sexual arousal or gratification resulting from handling a fetish (or a specific part of the body other than the sexual organs) | Synonyms: fetishism |
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| (noun) a belief in the magical power of fetishes (or the worship of a fetish) | Synonyms: fetishism |
| feticide | (noun) the act of destroying a fetus | Synonyms: aborticide |
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| fetidness | (noun) the attribute of having a strong offensive smell | Synonyms: foulness, malodorousness, rankness, stinkiness |
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| fetish | (noun) excessive or irrational devotion to some activity | Synonyms: fetich |
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| (noun) a charm superstitiously believed to embody magical powers | Synonyms: fetich, hoodoo, juju, voodoo |
| (noun) a form of sexual desire in which gratification depends to an abnormal degree on some object or item of clothing or part of the body | - |
| fetishism | (noun) sexual arousal or gratification resulting from handling a fetish (or a specific part of the body other than the sexual organs) | Synonyms: fetichism |
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| (noun) a belief in the magical power of fetishes (or the worship of a fetish) | Synonyms: fetichism |
| fetishist | (noun) one who engages in fetishism (especially of a sexual nature) | - |
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| fetlock | (noun) projection behind and above a horse's hoof | - |
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| (noun) the joint between the cannon bone and the pastern | Synonyms: fetlock joint |
| fetology | (noun) the branch of medicine concerned with the fetus in the uterus | Synonyms: foetology |
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