Spectrometer in which
electromagnetic radiation is separated spatially into its component
wavenumbers by a dispersive element, such as a prism or a diffraction grating.
Source:
PAC, 2021, 93, 647. 'Glossary of methods and terms used in analytical spectroscopy (IUPAC Recommendations 2019)' on page 656 (https://doi.org/10.1515/pac-2019-0203)