| seismograph | (noun) a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake) | - |
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| seismography | (noun) the measurement of tremors and shocks and undulatory movements of earthquakes | - |
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| serape | (noun) a long brightly colored shawl; worn mainly by Mexican men | Synonyms: sarape |
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| seraph | (noun) an angel of the first order; usually portrayed as the winged head of a child | - |
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| serigraph | (noun) a print made using a stencil process in which an image or design is superimposed on a very fine mesh screen and printing ink is squeegeed onto the printing surface through the area of the screen that is not covered by the stencil | Synonyms: silk screen print, silkscreen |
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| serigraphy | (noun) the act of making a print by the silkscreen method | - |
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| shadowgraph | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiogram, radiograph, skiagram, skiagraph |
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| shrapnel | (noun) shell containing lead pellets that explodes in flight | - |
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| skiagraph | (noun) a photographic image produced on a radiosensitive surface by radiation other than visible light (especially by X-rays or gamma rays) | Synonyms: radiogram, radiograph, shadowgraph, skiagram |
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| skiagraphy | (noun) the process of making a radiograph; producing an image on a radiosensitive surface by radiation other than visible light | Synonyms: radiography |
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| skyscraper | (noun) a very tall building with many stories | - |
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| sonograph | (noun) an instrument that uses the differential transmission and reflection of ultrasonic waves in order to provide an image of a bodily organ | - |
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| sonography | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: echography, ultrasonography, ultrasound |
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| spectrograph | (noun) a spectroscope by which spectra can be photographed | - |
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| (noun) a photographic record of a spectrum | Synonyms: spectrogram |
| spirograph | (noun) a measuring instrument for recording the depth and rapidity of breathing movements | - |
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| steganography | (noun) act of writing in code or cipher | Synonyms: coding, cryptography, secret writing |
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| stenograph | (noun) a machine for typewriting shorthand characters | - |
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| (noun) a shorthand character | - |
| stenographer | (noun) someone skilled in the transcription of speech (especially dictation) | Synonyms: amanuensis, shorthand typist |
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| stenography | (noun) the act or art of writing in shorthand | - |
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| (noun) a method of writing rapidly using an abbreviated symbolic system | Synonyms: shorthand, tachygraphy |
| stereophotography | (noun) photography producing images that appear to have depth and solidness and that are created by using a special device (called a stereoscope) to look at two slightly different photographs of something at the same time. | Synonyms: stereo photography, stereoscopic photography |
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| strap | (noun) whip consisting of a strip of leather used in flogging | - |
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| (noun) an elongated leather strip (or a strip of similar material) for binding things together or holding something in position | - |
| (noun) a band that goes over the shoulder and supports a garment or bag | Synonyms: shoulder strap |
| (noun) hanger consisting of a loop of leather suspended from the ceiling of a bus or train; passengers hold onto it | - |
| strapado | (noun) a form of torture in which the hands are tied behind a person's back and they are lifted off the ground by a rope tied to their wrists, then allowed to drop until their fall is checked with a jerk by the rope | Synonyms: strappado |
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| straphanger | (noun) a standing subway or bus passenger who grips a hanging strap for support | - |
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| (noun) a commuter who uses public transportation | - |
| strapless | (noun) a woman's garment that exposes the shoulders and has no shoulder straps | - |
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| strapline | (noun) a secondary heading, especially one printed above another. | - |
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| strappado | (noun) a form of torture in which the hands are tied behind a person's back and they are lifted off the ground by a rope tied to their wrists, then allowed to drop until their fall is checked with a jerk by the rope | Synonyms: strapado |
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| strapper | (noun) a large and strong and heavyset man | Synonyms: bruiser, bull, Samson |
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| stratigraphy | (noun) the branch of geology that studies the arrangement and succession of strata | - |
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| suntrap | (noun) a terrace or garden oriented to take advantage of the sun while protected from cold winds | Synonyms: solar trap |
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| tachograph | (noun) a tachometer that produces a graphical record of its readings; used to record the speed and duration of trips in a motor vehicle | - |
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| tachygraphy | (noun) a method of writing rapidly using an abbreviated symbolic system | Synonyms: shorthand, stenography |
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| telegraph | (noun) apparatus used to communicate at a distance over a wire (usually in Morse code) | Synonyms: telegraphy |
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| telegrapher | (noun) someone who transmits messages by telegraph | Synonyms: telegraph operator, telegraphist |
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| telegraphese | (noun) language characterized by terseness and ellipsis as in telegrams | - |
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| telegraphist | (noun) someone who transmits messages by telegraph | Synonyms: telegraph operator, telegrapher |
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| telegraphy | (noun) apparatus used to communicate at a distance over a wire (usually in Morse code) | Synonyms: telegraph |
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| (noun) communicating at a distance by electric transmission over wire | - |
| telephotograph | (noun) a photograph made with a telephoto lens | Synonyms: telephoto |
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| (noun) a photograph transmitted and reproduced over a distance | - |
| telephotography | (noun) photography using a telephoto lens | - |
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| (noun) transmission and reproduction of photographs and charts and pictures over a distance | - |
| terrapin | (noun) any of various edible North American web-footed turtles living in fresh or brackish water | - |
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| tetrapod | (noun) a vertebrate animal having four feet or legs or leglike appendages | - |
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| therapeutic | (noun) a medicine or therapy that cures disease or relieve pain | Synonyms: curative, cure, remedy |
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| therapeutics | (noun) branch of medicine concerned with the treatment of disease | - |
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| therapist | (noun) a person skilled in a particular type of therapy | Synonyms: healer |
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| therapsid | (noun) probably warm-blooded; considered direct ancestor of mammals | Synonyms: protomammal |
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| therapy | (noun) (medicine) the act of caring for someone (as by medication or remedial training etc.) | Synonyms: treatment |
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| thermograph | (noun) a thermometer that records temperature variations on a graph as a function of time | Synonyms: thermometrograph |
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| (noun) medical instrument that uses an infrared camera to reveal temperature variations on the surface of the body | - |
| thermography | (noun) diagnostic technique using a thermograph to record the heat produced by different parts of the body; used to study blood flow and to detect tumors | - |
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| thermometrograph | (noun) a thermometer that records temperature variations on a graph as a function of time | Synonyms: thermograph |
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| thermotherapy | (noun) the use of heat to treat a disease or disorder; heating pads or hot compresses or hot-water bottles are used to promote circulation in peripheral vascular disease or to relax tense muscles | - |
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| tomograph | (noun) X-ray machine in which a computer builds a detailed image of a particular plane through an object from multiple X-ray measurements | - |
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| tomography | (noun) (medicine) obtaining pictures of the interior of the body | Synonyms: imaging |
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| tonograph | (noun) A recording tonometer, used in medicine. | - |
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| topography | (noun) the configuration of a surface and the relations among its man-made and natural features | - |
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| (noun) precise detailed study of the surface features of a region | - |
| trap | (noun) the act of concealing yourself and lying in wait to attack by surprise | Synonyms: ambuscade, ambush, lying in wait |
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| (noun) a device in which something (usually an animal) can be caught and penned | - |
| (noun) a light two-wheeled carriage | - |
| (noun) a hazard on a golf course | Synonyms: bunker, sand trap |
| (noun) a device to hurl clay pigeons into the air for trapshooters | - |
| (noun) drain consisting of a U-shaped section of drainpipe that holds liquid and so prevents a return flow of sewer gas | - |
| (noun) informal terms for the mouth | Synonyms: cakehole, gob, hole, maw, yap |
| (noun) something (often something deceptively attractive) that catches you unawares | Synonyms: snare |
| trapeze | (noun) a swing used by circus acrobats | - |
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| trapezium | (noun) the wrist bone on the thumb side of the hand that articulates with the 1st and 2nd metacarpals | Synonyms: os trapezium, trapezium bone |
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| (noun) a quadrilateral with no parallel sides | - |
| trapezius | (noun) either of two flat triangular muscles of the shoulder and upper back that are involved in moving the shoulders and arms | Synonyms: cowl muscle, musculus trapezius, trapezius muscle |
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| trapezohedron | (noun) a polyhedron whose faces are trapeziums | - |
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| trapezoid | (noun) the wrist bone between the trapezium and the capitate bones | Synonyms: os trapezoideum, trapezoid bone |
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| (noun) a quadrilateral with two parallel sides | - |
| trapper | (noun) someone who sets traps for animals (usually to obtain their furs) | - |
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| trapping | (noun) stable gear consisting of a decorated covering for a horse, especially (formerly) for a warhorse | Synonyms: caparison, housing |
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| trappings | (noun) (usually plural) accessory wearing apparel | Synonyms: furnishing |
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| trapshooter | (noun) a person who engages in shooting at clay pigeons that are hurled into the air by a trap | - |
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| trapshooting | (noun) the sport of shooting at clay pigeons that are hurled upward in such a way as to simulate the flight of a bird | Synonyms: skeet, skeet shooting |
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| typographer | (noun) one who sets written material into type | Synonyms: compositor, setter, typesetter |
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| typography | (noun) the craft of composing type and printing from it | - |
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| (noun) art and technique of printing with movable type | Synonyms: composition |
| ultrasonography | (noun) using the reflections of high-frequency sound waves to construct an image of a body organ (a sonogram); commonly used to observe fetal growth or study bodily organs | Synonyms: echography, sonography, ultrasound |
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| utahraptor | (noun) large (20-ft) and swift carnivorous dinosaur having an upright slashing claw 15 inches long on each hind foot; early Cretaceous | Synonyms: superslasher |
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| velociraptor | (noun) small active carnivore that probably fed on protoceratops; possibly related more closely to birds than to other dinosaurs | - |
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| venography | (noun) roentgenographic examination of veins | - |
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| verapamil | (noun) a drug (trade names Calan and Isoptin) used as an oral or parenteral calcium blocker in cases of hypertension or congestive heart failure or angina or migraine | Synonyms: Calan, Isoptin |
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| vibraphone | (noun) a percussion instrument similar to a xylophone but having metal bars and rotating disks in the resonators that produce a vibrato sound | Synonyms: vibes, vibraharp |
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| vibraphonist | (noun) a musician who plays the vibraphone | Synonyms: vibist |
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| viewgraph | (noun) a transparency for use with an overhead projector | Synonyms: overhead |
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| watchstrap | (noun) a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist | Synonyms: bracelet, watch bracelet, watchband, wristband |
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| wrap | (noun) cloak that is folded or wrapped around a person | Synonyms: wrapper |
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| (noun) the covering (usually paper or cellophane) in which something is wrapped | Synonyms: wrapper, wrapping |
| (noun) a sandwich in which the filling is rolled up in a soft tortilla | - |
| wraparound | (noun) a garment (as a dress or coat) with a full length opening; adjusts to the body by wrapping around | - |
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| wrapper | (noun) cloak that is folded or wrapped around a person | Synonyms: wrap |
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| (noun) a loose dressing gown for women | Synonyms: housecoat, neglige, negligee, peignoir |
| (noun) the covering (usually paper or cellophane) in which something is wrapped | Synonyms: wrap, wrapping |
| wrapping | (noun) the covering (usually paper or cellophane) in which something is wrapped | Synonyms: wrap, wrapper |
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| (noun) an enveloping bandage | Synonyms: swathe |
| xerography | (noun) forming an image by the action of light on a specially coated charged plate; the latent image is developed with powders that adhere only to electrically charged areas | - |
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| xeroradiography | (noun) radiography using X-rays and xerographic (rather than roentgenographic) techniques | - |
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