Grating
01
a covering with parallel or crossed bars, used to block a passage while allowing air or light to pass
例
The window was protected by a sturdy iron grating.
02
a frame of iron bars designed to hold a fire in a fireplace or furnace
例
He placed the logs carefully on the grating before lighting the fire.
03
an optical device with many parallel grooves that disperses a beam of light or other electromagnetic radiation into its component wavelengths to produce a spectrum
例
The physicist used a grating to study the light spectrum.
