| 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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| stratigraphy | (noun) the branch of geology that studies the arrangement and succession of strata | - |
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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 | - |
| 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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| 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 | - |
| 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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| venography | (noun) roentgenographic examination of veins | - |
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| viewgraph | (noun) a transparency for use with an overhead projector | Synonyms: overhead |
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| 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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