(nautical, in the plural) The strong wooden lattice used to cover a hatch, admitting light and air; also, a movable lattice used for the flooring of boats.
Esimerkit
Add a few gratings of nutmeg to the hot milk.
Grating means (typically of a voice) harsh and unpleasant.
The voice of crow is described as harsh and grating.
A grating is a barrier that has parallel or crossed bars blocking a passage but admitting air.