gratings
noun(grat-ing)
a wooden or metal lattice used to close or floor an opening
gratings
noun(grat-ing)
a partition, covering, or frame of parallel bars or crossbars
gratings
noun(grat-ing)
a system of close equidistant and parallel lines or bars ruled on a polished surface to produce spectra by diffraction
gratings
noun(grat-ing)
grating