| tragus | (noun) a small cartilaginous flap in front of the external opening of the ear | - |
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| transfiguration | (noun) the act of transforming so as to exalt or glorify | - |
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| (noun) a striking change in appearance or character or circumstances | Synonyms: metamorphosis |
| travelogue | (noun) a film or illustrated lecture on traveling | Synonyms: travelog |
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| triangularity | (noun) the property of being shaped like a triangle | - |
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| triangulation | (noun) a method of surveying; the area is divided into triangles and the length of one side and its angles with the other two are measured, then the lengths of the other sides can be calculated | - |
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| (noun) a trigonometric method of determining the position of a fixed point from the angles to it from two fixed points of a known distance apart; useful in navigation | - |
| unambiguity | (noun) clarity achieved by the avoidance of ambiguity | Synonyms: unequivocalness |
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| unguent | (noun) semisolid preparation (usually containing a medicine) applied externally as a remedy or for soothing an irritation | Synonyms: balm, ointment, salve, unction |
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| unguiculate | (noun) a mammal having nails or claws | Synonyms: unguiculate mammal |
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| unguis | (noun) any rigid body structure composed primarily of keratin | Synonyms: horny structure |
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| ungulate | (noun) any of a number of mammals with hooves that are superficially similar but not necessarily closely related taxonomically | Synonyms: hoofed mammal |
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| unregularity | (noun) not characterized by a fixed principle or rate; at irregular intervals | Synonyms: irregularity |
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| vagueness | (noun) unclearness by virtue of being poorly expressed or not coherent in meaning | - |
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| (noun) indistinctness of shape or character | - |
| vagus | (noun) a mixed nerve that supplies the pharynx and larynx and lungs and heart and esophagus and stomach and most of the abdominal viscera | Synonyms: nervus vagus, pneumogastric, pneumogastric nerve, tenth cranial nerve, vagus nerve, wandering nerve |
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| valgus | (noun) a deformity in which there is an abnormal displacement of part of a limb away from the midline of the body | - |
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| vanguard | (noun) the position of greatest importance or advancement; the leading position in any movement or field | Synonyms: cutting edge, forefront |
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| (noun) the leading units moving at the head of an army | Synonyms: van |
| (noun) any creative group active in the innovation and application of new concepts and techniques in a given field (especially in the arts) | Synonyms: avant-garde, new wave, van |
| virgule | (noun) a punctuation mark (/) used to separate related items of information | Synonyms: diagonal, separatrix, slash, solidus, stroke |
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| vogue | (noun) the popular taste at a given time | Synonyms: style, trend |
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| (noun) a current state of general acceptance and use | - |
| waveguide | (noun) a hollow metal conductor that provides a path to guide microwaves; used in radar | Synonyms: wave guide |
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| yogurt | (noun) a custard-like food made from curdled milk | Synonyms: yoghourt, yoghurt |
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| ziggurat | (noun) a rectangular tiered temple or terraced mound erected by the ancient Assyrians and Babylonians | Synonyms: zikkurat, zikurat |
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