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vertical reference

См. также в других словарях:

  • vertical — vertical, ale, aux [ vɛrtikal, o ] adj. et n. • 1587; point vertical 1545; bas lat. verticalis, de vertex, verticis « sommet » I ♦ Adj. 1 ♦ Qui suit la direction de la pesanteur, du fil à plomb en un lieu; perpendiculaire à un plan horizontal.… …   Encyclopédie Universelle

  • Vertical direction — In astronomy, geography, geometry and related sciences and contexts, a direction passing by a given point is said to be vertical if it is locally aligned with the gradient of the gravity field, i.e., with the direction of the gravitational force… …   Wikipedia

  • Vertical deflection — The vertical deflection (deflection of the plumb line, astro geodetic deflection) at a point on the earth is a measure of how far the direction of the local gravity field has been shifted by local anomalies such as nearby mountains. (Here gravity …   Wikipedia

  • Vertical angles — Two lines intersect to create two pairs of vertical angles. One pair consists of angles A and B; the second pair consists of angles C and D. In geometry, a pair of angles is said to be vertical (also opposite and vertically opposite, which is… …   Wikipedia

  • Vertical blanking interval — The vertical blanking interval (VBI), also known as the vertical interval or VBLANK, is the time difference between the last line of one frame or field of a raster display, and the beginning of the next. It is present in analog television, VGA,… …   Wikipedia

  • Reference ellipsoid — In geodesy, a reference ellipsoid is a mathematically defined surface that approximates the geoid, the truer figure of the Earth, or other planetary body.Because of their relative simplicity, reference ellipsoids are used as a preferred surface… …   Wikipedia

  • Vertical (angles) — |year=c. 300 BC Proposition I:13.] The most obvious way to tell if two angles are vertical angles are if they form a X G. External links * [http://www.mathopenref.com/anglesvertical.html Definition and properties of vertical angles] With… …   Wikipedia

  • vertical blood vessel — last vertical blood vessel (the most posterior blood vessel extending from the dorsal aorta to the nephros and used as a reference point in anguilliform larval descriptions) …   Dictionary of ichthyology

  • vertical angle — in dental radiology, the angle measured within a vertical plane, at which the central ray of the useful beam is projected relative to a horizontal plane of reference …   Medical dictionary

  • reference datum — As used in the loading of aircraft, an imaginary vertical plane at or near the nose of the aircraft from which all horizontal distances are measured for balance purposes. Diagrams of each aircraft show this reference datum as “balance station… …   Military dictionary

  • reference datum — An imaginary vertical plane at or near the nose of an aircraft from which all horizontal distances are measured for balance purposes. Also called the balance station zero. See datum or datum line …   Aviation dictionary

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