diffraction grating diffraction disk • diffraction spectroscope · · · Info · Definitions · Characters · · diffraction grating · · Text Common · · Latin · · Scripts 19 · · Length Definitions · · · (noun) 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. Synonyms: grating. · · Noun Definition 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 d latin small letter d U+0064 f latin small letter f U+0066 g latin small letter g U+0067 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F r latin small letter r U+0072 t latin small letter t U+0074