Skip to definition.
Get the FREE one-click dictionary software for Windows or the iPhone/iPad and Android apps

Noun: diffraction grating  di'frak-shun 'grey-ting
  1. 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
    - grating

Derived forms: diffraction gratings

Type of: optical device

Encyclopedia: Diffraction grating