gratings

Noun

• a barrier that has parallel or crossed bars blocking a passage but admitting air
• a frame of iron bars to hold a fire
• 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
• plural of grating

Verb

• furnish with a grate
• gnaw into; make resentful or angry
• reduce to small shreds or pulverize by rubbing against a rough or sharp perforated surface
• make a grating or grinding sound by rubbing together
• scratch repeatedly

Synonyms

diffraction grating, eat into, fret, grate, grating, grind, rankle, scrape