a barrier that has parallel or crossed bars blocking a passage but admitting air

[ Syn: grate ]

a frame of iron bars to hold a fire

[ Syn: grate ]

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

[ Syn: diffraction grating ]

unpleasantly harsh or grating in sound; a gravelly voice

[ Syn: gravelly , rasping , raspy , rough , scratchy ]