Grating

of Grate

A partition, covering, or frame of parallel or cross bars; a latticework resembling a window grate; as, the grating of a prison or convent.

A system of close equidistant and parallel lines lines or bars, especially lines ruled on a polished surface, used for producing spectra by diffraction; -- called also diffraction grating.

The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable Lattice used for the flooring of boats.

That grates; making a harsh sound; harsh.

A harsh sound caused by attrition.

a frame of iron bars to hold a fire

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