| alstroemeria | (noun) any of various South American plants of the genus Alstroemeria valued for their handsome umbels of beautiful flowers | - |
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| anastrophe | (noun) the reversal of the normal order of words | Synonyms: inversion |
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| angstrom | (noun) a metric unit of length equal to one ten billionth of a meter (or 0.0001 micron); used to specify wavelengths of electromagnetic radiation | Synonyms: A, angstrom unit |
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| antistrophe | (noun) the section of a choral ode answering a previous strophe in classical Greek drama; the second of two metrically corresponding sections in a poem | - |
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| apostrophe | (noun) address to an absent or imaginary person | - |
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| (noun) the mark (') used to indicate the omission of one or more letters from a printed word | - |
| astrobiology | (noun) the branch of biology concerned with the effects of outer space on living organisms and the search for extraterrestrial life | Synonyms: exobiology, space biology |
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| astrocyte | (noun) comparatively large neuroglial cell | - |
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| astrodome | (noun) a transparent dome on top of an airplane where the navigator can make celestial observations | - |
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| astrodynamics | (noun) the branch of astronomy that studies the motion of natural and artificial bodies in space | - |
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| astrogator | (noun) the navigator of a spacecraft | - |
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| astroglia | (noun) tissue consisting of large stellate neuroglial cells | Synonyms: macroglia |
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| astrolabe | (noun) an early form of sextant | - |
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| astrolatry | (noun) the worship of planets or stars | Synonyms: worship of heavenly bodies |
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| astrologer | (noun) someone who predicts the future by the positions of the planets and sun and Moon | Synonyms: astrologist |
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| astrologist | (noun) someone who predicts the future by the positions of the planets and sun and Moon | Synonyms: astrologer |
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| astrology | (noun) a pseudoscience claiming divination by the positions of the planets and sun and moon | Synonyms: star divination |
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| astrometry | (noun) the branch of astronomy that deals with the measurement of the position and motion of celestial bodies | - |
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| astronaut | (noun) a person trained to travel in a spacecraft | Synonyms: cosmonaut, spaceman |
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| astronautics | (noun) the theory and practice of navigation through air or space | Synonyms: aeronautics |
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| astronavigation | (noun) navigating according to the positions of the stars | Synonyms: celestial navigation |
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| astronomer | (noun) a physicist who studies astronomy | Synonyms: stargazer, uranologist |
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| astronomy | (noun) the branch of physics that studies celestial bodies and the universe as a whole | Synonyms: uranology |
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| astrophysicist | (noun) an astronomer who studies the physical properties of celestial bodies | - |
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| astrophysics | (noun) the branch of astronomy concerned with the physical and chemical properties of celestial bodies | - |
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| backstroke | (noun) a swimming stroke that resembles the crawl except the swimmer lies on his or her back | - |
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| backstroker | (noun) someone who swims the backstroke | - |
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| bistro | (noun) a small informal restaurant; serves wine | - |
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| boustrophedon | (noun) an ancient writing system: having alternate lines written in opposite directions; literally `as the ox ploughs' | - |
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| breaststroke | (noun) a swimming stroke; the arms are extended together in front of the head and swept back on either side accompanied by a frog kick | - |
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| breaststroker | (noun) someone who swims the breaststroke | - |
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| catastrophe | (noun) an event resulting in great loss and misfortune | Synonyms: calamity, cataclysm, disaster, tragedy |
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| (noun) a sudden violent change in the earth's surface | Synonyms: cataclysm |
| (noun) a state of extreme (usually irremediable) ruin and misfortune | Synonyms: disaster |
| chondrodystrophy | (noun) an inherited skeletal disorder beginning before birth; cartilage is converted to bone resulting in dwarfism | Synonyms: achondroplasia, achondroplasty, osteosclerosis congenita |
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| cistron | (noun) (genetics) a segment of DNA that is involved in producing a polypeptide chain; it can include regions preceding and following the coding DNA as well as introns between the exons; it is considered a unit of heredity | Synonyms: factor, gene |
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| claustrophobe | (noun) a person suffering from claustrophobia | - |
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| claustrophobia | (noun) a morbid fear of being closed in a confined space | - |
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| destroyer | (noun) a small fast lightly armored but heavily armed warship | Synonyms: guided missile destroyer |
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| (noun) a person who destroys or ruins or lays waste to | Synonyms: ruiner, undoer, uprooter, waster |
| diastrophism | (noun) the process of deformation that produces continents and ocean basins in the earth's crust | - |
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| diethylstilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilboestrol, stilbestrol, stilboestrol |
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| diethylstilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, stilbestrol, stilboestrol |
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| downstroke | (noun) a stroke normally made in a downward direction | - |
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| dystrophy | (noun) any degenerative disorder resulting from inadequate or faulty nutrition | - |
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| (noun) any of several hereditary diseases of the muscular system characterized by weakness and wasting of skeletal muscles | Synonyms: muscular dystrophy |
| epistrophe | (noun) repetition of the ends of two or more successive sentences, verses, etc. | Synonyms: epiphora |
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| estrogen | (noun) a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics | Synonyms: oestrogen |
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| estrone | (noun) a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency | Synonyms: Estronol, oestrone, theelin |
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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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| guestroom | (noun) a bedroom that is kept for the use of guests | - |
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| heatstroke | (noun) collapse caused by exposure to excessive heat | Synonyms: heat hyperpyrexia |
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| hexestrol | (noun) estrogen compound used to treat menstrual irregularities and menopausal symptoms and to prevent pregnancy | - |
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| instroke | (noun) the stroke of an engine piston moving away from the crankshaft | - |
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| keystroke | (noun) the stroke of a key; one depression of a key on a keyboard | Synonyms: key stroke |
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| klystron | (noun) an electron tube used to generate or amplify electromagnetic radiation in the microwave region by velocity modulation | - |
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| lipochondrodystrophy | (noun) hereditary disease (autosomal recessive) consisting of an error is mucopolysaccharide metabolism; characterized by severe abnormalities in development of skeletal cartilage and bone and mental retardation | Synonyms: dysostosis multiplex, gargoylism, Hurler's disease, Hurler's syndrome |
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| maelstrom | (noun) a powerful circular current of water (usually the result of conflicting tides) | Synonyms: vortex, whirlpool |
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| maestro | (noun) an artist of consummate skill | Synonyms: master |
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| masterstroke | (noun) an achievement demonstrating great skill or mastery | - |
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| megestrol | (noun) a synthetic progestational compound used to treat endometrial carcinoma | Synonyms: megestrol acetate |
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| minestrone | (noun) soup made with a variety of vegetables | Synonyms: petite marmite, vegetable soup |
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| monstrosity | (noun) something hideous or frightful | - |
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| (noun) a person or animal that is markedly unusual or deformed | Synonyms: freak, lusus naturae, monster |
| oestrogen | (noun) a general term for female steroid sex hormones that are secreted by the ovary and responsible for typical female sexual characteristics | Synonyms: estrogen |
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| oestrone | (noun) a naturally occurring weak estrogenic hormone secreted by the mammalian ovary; synthesized (trade name Estronol) and used to treat estrogen deficiency | Synonyms: estrone, Estronol, theelin |
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| osteodystrophy | (noun) defective bone development; usually attributable to renal disease or to disturbances in calcium and phosphorus metabolism | - |
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| outstroke | (noun) the stroke of an engine piston moving toward the crankshaft | - |
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| perestroika | (noun) an economic policy adopted in the former Soviet Union; intended to increase automation and labor efficiency but it led eventually to the end of central planning in the Russian economy | - |
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| plastron | (noun) (zoology) the part of a turtle's shell forming its underside | - |
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| (noun) a large pad worn by a fencer to protect the chest | - |
| (noun) a metal breastplate that was worn under a coat of mail | - |
| (noun) the front of man's dress shirt | - |
| (noun) the ornamental front of a woman's bodice or shirt | - |
| restroom | (noun) a toilet that is available to the public | Synonyms: comfort station, convenience, public convenience, public lavatory, public toilet, toilet facility, wash room |
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| sidestroke | (noun) a swimming stroke in which the arms move forward and backward while the legs do a scissors kick | - |
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| stilbestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, diethylstilboestrol, stilboestrol |
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| stilboestrol | (noun) a potent estrogen used in medicine and in feed for livestock and poultry | Synonyms: DES, diethylstilbestrol, diethylstilboestrol, stilbestrol |
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| strobe | (noun) scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary | Synonyms: strobe light, stroboscope |
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| strobile | (noun) cone-shaped mass of ovule- or spore-bearing scales or bracts | Synonyms: cone, strobilus |
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| strobilus | (noun) cone-shaped mass of ovule- or spore-bearing scales or bracts | Synonyms: cone, strobile |
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| stroboscope | (noun) scientific instrument that provides a flashing light synchronized with the periodic movement of an object; can make moving object appear stationary | Synonyms: strobe, strobe light |
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| stroke | (noun) (sports) the act of swinging or striking at a ball with a club or racket or bat or cue or hand | Synonyms: shot |
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| (noun) a light touch with the hands | Synonyms: stroking |
| (noun) a single complete movement | - |
| (noun) any one of the repeated movements of the limbs and body used for locomotion in swimming or rowing | - |
| (noun) a punctuation mark (/) used to separate related items of information | Synonyms: diagonal, separatrix, slash, solidus, virgule |
| (noun) a mark made on a surface by a pen, pencil, or paintbrush | - |
| (noun) the maximum movement available to a pivoted or reciprocating piece by a cam | Synonyms: cam stroke, throw |
| (noun) a light touch | - |
| (noun) anything that happens suddenly or by chance without an apparent cause | Synonyms: accident, chance event, fortuity |
| (noun) the oarsman nearest the stern of the shell who sets the pace for the rest of the crew | - |
| (noun) (golf) the unit of scoring in golf is the act of hitting the ball with a club | - |
| (noun) a sudden loss of consciousness resulting when the rupture or occlusion of a blood vessel leads to oxygen lack in the brain | Synonyms: apoplexy, cerebrovascular accident, CVA |
| stroking | (noun) a light touch with the hands | Synonyms: stroke |
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| stroll | (noun) a leisurely walk (usually in some public place) | Synonyms: amble, perambulation, promenade, saunter |
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| stroller | (noun) a small vehicle with four wheels in which a baby or child is pushed around | Synonyms: baby buggy, baby carriage, carriage, go-cart, perambulator, pram, pushchair, pusher |
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| (noun) someone who walks at a leisurely pace | Synonyms: ambler, saunterer |
| stroma | (noun) the supporting tissue of an organ (as opposed to parenchyma) | - |
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| (noun) the dense colorless framework of a chloroplast | - |
| (noun) a mass of fungal tissue that has spore-bearing structures embedded in it or on it | - |
| stromateid | (noun) small marine fish with a short compressed body and feeble spines | Synonyms: butterfish, stromateid fish |
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| strongbox | (noun) a strongly made box for holding money or valuables; can be locked | Synonyms: deedbox |
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| stronghold | (noun) a strongly fortified defensive structure | Synonyms: fastness |
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| strongman | (noun) a powerful political figure who rules by the exercise of force or violence | - |
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| (noun) a man who performs feats of strength at a fair or circus | - |
| strongroom | (noun) a burglarproof and fireproof room in which valuables are kept | - |
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| strontianite | (noun) a mineral consisting of strontium carbonate | - |
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| strontium | (noun) a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite | Synonyms: atomic number 38, Sr |
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| strop | (noun) a leather strap used to sharpen razors | - |
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| strophanthin | (noun) a bitter and very toxic glycoside derived from plants of the genus Strophanthus; in moderate doses it is a cardiac stimulant but in larger doses it is a powerful poison; used in Africa as an arrow poison | - |
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