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Hasil cari dari kata atau frase: Guide meridian (0.00861 detik)
Found 1 items, similar to Guide meridian.
English → English (gcide) Definition: Guide meridian Guide \Guide\, n. [OE. giae, F. guide, It. guida. See Guide, v. t.] 1. A person who leads or directs another in his way or course, as in a strange land; one who exhibits points of interest to strangers; a conductor; also, that which guides; a guidebook. [1913 Webster] 2. One who, or that which, directs another in his conduct or course of life; a director; a regulator. [1913 Webster] He will be our guide, even unto death. --Ps. xlviii. 14. [1913 Webster] 3. Any contrivance, especially one having a directing edge, surface, or channel, for giving direction to the motion of anything, as water, an instrument, or part of a machine, or for directing the hand or eye, as of an operator; as: (a) (Water Wheels) A blade or channel for directing the flow of water to the wheel buckets. (b) (Surgery) A grooved director for a probe or knife. (c) (Printing) A strip or device to direct the compositor's eye to the line of copy he is setting. [1913 Webster] 4. (Mil.) A noncommissioned officer or soldier placed on the directing flank of each subdivision of a column of troops, or at the end of a line, to mark the pivots, formations, marches, and alignments in tactics. --Farrow. [1913 Webster] Guide bar (Mach.), the part of a steam engine on which the crosshead slides, and by which the motion of the piston rod is kept parallel to the cylinder, being a substitute for the parallel motion; -- called also guide, and slide bar. Guide block (Steam Engine), a block attached in to the crosshead to work in contact with the guide bar. Guide meridian. (Surveying) See under Meridian. Guide pile (Engin.), a pile driven to mark a place, as a point to work to. Guide pulley (Mach.), a pulley for directing or changing the line of motion of belt; an idler. --Knight. Guide rail (Railroads), an additional rail, between the others, gripped by horizontal driving wheels on the locomotive, as a means of propulsion on steep gradients. [1913 Webster] Meridian \Me*rid"i*an\, n. [F. m['e]ridien. See Meridian, a.] [1913 Webster] 1. Midday; noon. [1913 Webster] 2. Hence: The highest point, as of success, prosperity, or the like; culmination. [1913 Webster] I have touched the highest point of all my greatness, And from that full meridian of my glory I haste now to my setting. --Shak. [1913 Webster] 3. (Astron.) A great circle of the sphere passing through the poles of the heavens and the zenith of a given place. It is crossed by the sun at midday. [1913 Webster] 4. (Geog.) A great circle on the surface of the earth, passing through the poles and any given place; also, the half of such a circle included between the poles. [1913 Webster] Note: The planes of the geographical and astronomical meridians coincide. Meridians, on a map or globe, are lines drawn at certain intervals due north and south, or in the direction of the poles. [1913 Webster] Calculated for the meridian of, or fitted to the meridian of , or adapted to the meridian of, suited to the local circumstances, capabilities, or special requirements of. [1913 Webster] All other knowledge merely serves the concerns of this life, and is fitted to the meridian thereof. --Sir M. Hale. [1913 Webster] First meridian or prime meridian, the meridian from which longitudes are reckoned. The meridian of Greenwich is the one commonly employed in calculations of longitude by geographers, and in actual practice, although in various countries other and different meridians, chiefly those which pass through the capitals of the countries, are occasionally used; as, in France, the meridian of Paris; in the United States, the meridian of Washington, etc. Guide meridian (Public Land Survey), a line, marked by monuments, running North and South through a section of country between other more carefully established meridians called principal meridians, used for reference in surveying. [U.S.] Magnetic meridian, a great circle, passing through the zenith and coinciding in direction with the magnetic needle, or a line on the earth's surface having the same direction. Meridian circle (Astron.), an instrument consisting of a telescope attached to a large graduated circle and so mounted that the telescope revolves like the transit instrument in a meridian plane. By it the right ascension and the declination of a star may be measured in a single observation. Meridian instrument (Astron.), any astronomical instrument having a telescope that rotates in a meridian plane. Meridian of a globe, or Brass meridian, a graduated circular ring of brass, in which the artificial globe is suspended and revolves. [1913 Webster]

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