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"greating" is probably misspelled. Trying grating instead Definition of grating
grating has definitions from the fields of physics,optics |
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[ noun ] a barrier that has parallel or crossed bars blocking a passage but admitting air
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[ noun ] a frame of iron bars to hold a fire
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[ noun ] (physics,optics) optical device consisting of a surface with many parallel grooves in it; disperses a beam of light (or other electromagnetic radiation) into its wavelengths to produce its spectrum
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