Synonyms: diffraction grating, grating
Definition: 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
Similar words: optical device
Definition: a device for producing or controlling light
Definition: a frame of iron bars to hold a fire
Similar words: framework
Definition: a structure supporting or containing something
Definition: a barrier that has parallel or crossed bars blocking a passage but admitting air
Similar words: barrier
Definition: a structure or object that impedes free movement
Synonyms: grating, gravelly, rough, scratchy, rasping, raspy
Definition: unpleasantly harsh or grating in sound
Usage: a gravelly voice
Similar words: cacophonic, cacophonous
Definition: having an unpleasant sound
Usage: as cacophonous as a henyard- John McCarten