![]() lines ruled on a polished surface, used for producing spectra by diffraction - called also diffraction grating. noun (Optics) A system of close equidistant parallel lines or bars, esp.noun A partition, covering, or frame of parallel or cross bars a latticework resembling a window grate.See grate, n.įrom the GNU version of the Collaborative International Dictionary of English. noun In metallurgy, the act of separating large from small ore.noun A timber framework consisting of beams which cross one another at right angles to support the foundation of a heavy building in light, loose soil.noun A series of fine parallel lines on a surface of glass or polished metal ruled very close together, at the rate of 10,000 to 20,000, or even 40,000, to the inch: distinctively called a diffraction or diffractive grating.noun In optics: An arrangement of parallel wires in a plane, designed to produce spectra by diffraction: specifically called a real grating.noun A partition or frame of parallel or crossing bars an open latticework of wood or metal serving as a cover or guard, but admitting light, air, etc., as in the fair-weather hatches of a ship, the cover of the mouth of a drain or sewer, etc.Harsh rasping fretting irritating: as, grating sounds a grating temper.noun The act of rubbing harshly the harsh sound caused by the rasping or scraping of hard, rough bodies the feeling produced by harsh attrition.noun A grill or network of bars set in a window or door or used as a partition a grate.From The American Heritage® Dictionary of the English Language, 5th Edition.
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